Hell exothermic or endothermic

 Is Hell exothermic (gives off heat) or endothermic (absorbs heat)?

Most of the students wrote proofs of their beliefs using Boyle's Law (gas cools when it expands and heats when it is compressed) or some variant.

One student, however, wrote the following:

First, we need to know how the mass of Hell is changing in time. So we need to know the rate at which souls are moving into Hell and the rate at which they are leaving. I think that we can safely assume that once a soul gets to Hell, it will not leave. Therefore, no souls are leaving.

As for how many souls are entering Hell, let's look at the different Religions that exist in the world today. Most of these religions state that if you are not a member of their religion, you will go to Hell. Since there is more than one of these religions and since people do not belong to more than one religion, we can project that all souls go to Hell.

With birth and death rates as they are, we can expect the number of souls in Hell to increase exponentially. Now, we look at the rate of change of the volume in Hell because Boyle's Law states that in order for the temperature and pressure in Hell to stay the same, the volume of Hell has to expand proportionately as souls are added.

This gives two possibilities:
1. If Hell is expanding at a slower rate than the rate at which souls enter Hell, then the temperature and pressure in Hell will increase until all Hell breaks loose.
2. If Hell is expanding at a rate faster than the increase of souls in Hell, then the temperature and pressure will drop until Hell freezes over.
So which is it?

If we accept the postulate given to me by Teresa during my Freshman year that, "it will be a cold day in Hell before I go out with you", and take into account the fact that I went out with her last night, then number 2 must be true, and thus I am sure that Hell is exothermic and has already frozen over.
The corollary of this theory is that since Hell has frozen over, it follows that it is not accepting any more souls and is therefore, extinct . . . leaving only Heaven, thereby proving the existence of a divine being which explains why, last night, Teresa kept shouting "Oh my God."

Dog money leopard story

A wealthy man decided to go on a safari in Africa. He took his faithful pet dog along for company. One day the dog starts chasing butterflies and before long the dog discovers that he is lost.
So, wandering about he notices a leopard heading rapidly in his direction with the obvious intention of having lunch. The dog thinks, "Ok no! I'm in deep doodoo now!" Then he noticed some bones on the ground close by, and immediately settles down to chew on the bones with his back to the approaching cat.
Just as the leopard is about to leap, the dog exclaims loudly, "Wow, that was one delicious leopard. I wonder if there are any more around here?"
Hearing this the leopard halts his attack in mid-stride, as a look of terror comes over him, and slinks away into the trees. "Whew", says the leopard. "That was close. That dog nearly had me."
Meanwhile, a monkey who had been watching the whole scene from a nearby tree figures he can put this knowledge to good use and trade it for protection from the leopard. So, off he goes. But the dog saw him heading after the leopard with great speed, and figured that something must be up.
The monkey soon catches up with the leopard, spills the beans and strikes a deal for himself with the leopard. The leopard is furious at being made a fool of and says, "Here monkey, hop on my back and see what's going to happen to that conniving canine sunnuvabitch."
Now the dog sees the leopard coming with the monkey on his back, and thinks, "What am I going to do now?" But instead of running, the dog sits down with his back to his attackers pretending he hasn't seen them yet ... ... and just when they get close enough to hear, the dog says, "Where's that damn monkey? I just can never trust him. I sent him off half an hour ago to bring me another leopard, and he's still not back!!"

Bailout story

It is a slow day in a little Greek village. The rain is beating down and the streets are deserted. Times are tough, everybody is in debt, and everybody lives on credit. 

On this particular day a rich German tourist is driving through the village, stops at the local hotel and lays a €100 note on the desk, telling the hotel owner he wants to inspect the rooms upstairs in order to pick one to spend the night.

The owner gives him some keys and, as soon as the visitor has walked upstairs, the hotelier grabs the €100 note and runs next door to pay his debt to the butcher.  The butcher takes the €100 note and runs down the street to repay his debt to the pig farmer. The pig farmer takes the €100 note and heads off to pay his bill at the supplier of feed and fuel. 

The guy at the Farmers' Co-op takes the €100 note and runs to pay his drinks bill at the taverna. The publican slips the money along to the local prostitute drinking at the bar, who has also been facing hard times and has had to offer him "services" on credit. 

The hooker then rushes to the hotel and pays off her room bill to the hotel owner with the €100 note. The hotel proprietor then places the €100 note back on the counter so the rich traveler will not suspect anything. At that moment the traveler comes down the stairs, picks up the €100 note, states that the rooms are not satisfactory, pockets the money, and leaves town.

(No one produced anything. No one earned anything. However, the whole village is now out of debt and looking to the future with a lot more optimism. And that, Ladies and Gentlemen, is how the bailout package works.)

From books

“You and I, it’s as though we have been taught to kiss in heaven and sent down to earth together, to see if we know what we were taught.” 
 —Boris Pasternak, Doctor Zhivago“If I were to live a thousand years, I would belong to you for all of them. If we were to live a thousand lives, I would want to make you mine in each one.” 
 —Michelle Hodkin, The Evolution of Mara Dyer“I took a photo of us mid-embrace. When I am old and alone, I will remember that I once held something truly beautiful.” 
 —Joe Dunthorne, Submarine“Yet everything that touches us, me and you,
 takes us together like a violin’s bow,
 which draws one voice out of two separate strings.” 
 —Rainer Maria Rilke, “Love Song”“Your name is a golden bell hung in my heart. I would break my body to pieces to call you once by your name.” 
 —Peter S. Beagle, The Last Unicorn“You gave me a forever within the numbered days, and I’m grateful.” 
 —John Green, The Fault in Our Stars

Beautiful words

While I was in standard 9, I said this to her - at a time when I didn't understand the "crush" thing.

"Reddy, my life is still beautiful, though I have been crushed by you for 3 long years." (She's a Reddy gaaru)

She smiled so ravishingly. Note, she didn't laugh, so that says I was not comical. So this was maybe nice, if not romantic. We were just good friends then.

One day during my 9th, at our library class, she was looking for some book to read at Science section, and I was standing aside her and said this,

"I hate science Reddy. Because there's no book explaining why you look so cute! Are you looking for that book too?"

For this, she grinned and nibbed my left arm with her pen. 

I proposed her on the last session ending exam of 11th class, it was Social Sciences paper for her. 

As we walked out together, out of our exam hall (my roll number is 16, hers 15), I asked her this, 

"I have been having this doubt in social sciences, which is out of your syllabus. My question is, what will be my social science quotient if I ask you to marry me, and say I am in love with you, and have been so from for the past 5 years?" 

Her answer, "I don't know jumbo but I am sure, only I should evaluate this question if you were to ask." 

That was a green :D.

So, from here, what all I had said was, after we were lovers. 

She bought her first phone, a Nokia N series, during our 12th special classes. She was clicking pictures of her friends. "Nice really, but give me the phone, I will take a picture of yours." I shouted. She heard me, and handed me her phone. 

I was holding the phone with its camera on, and said this, 
"Wait, I am sure this will get me an Oscar for best photograph."

At farewell speech, almost all our classmates, including my techers, knew the relationship we both shared, I made this point during the small speech we had to give. 

"Ahead of us is now college, and for all of us, leaving school, our friends might be the hardest thing to accept at this juncture, unlike you all, I am clever, which is why I am taking one special person from this school to my life." 

After joining Engineering, after my freshman day. 

Texted her this, 
"Hey Reddu, first day was wow. And one thing after seeing so many girls today. I thought only you were beautiful in this whole world for so many years. Damn, I didn't know I was so right." 

Her reply, "Hi buju, great. And really? How many of them did you see to arrive at this conclusion?" 

Me, "Almost all."

Her reply, "And you saw no one beautiful than me?"

Me, "Ya darl, not even one :-( I hope God shows mercy upon us to have a baby girl."

When she asked why I don't believe in God and religion,

"Its not like that. I believe in monotheism. I can't believe and worship you and him at the same time." 

Once she asked me if I would leave her if I found a better girl, my response was

"Hard truth, of course. I would leave you at home and drop her at school. And you can leave me to pick her back to our home."

Need not greed

'There is enough for everyone's need but not for everyone's greed' is indeed an ingenious statement by an ingenious man called Mahatma Gandhi. There is no doubt about how true this statement is and there are many ways one can prove it.

The journey started after the creation of human being in this world. As man got matured he kept on inventing new things to get a better life and for a good living. His wants were not restricted, desires were boundary less and his doggedness of finding reason for everything made him an undefined creature. And that’s how an environment has been created in which we are living now. If we see this in a broader perspective, all this happened because of greed. It’s the man’s greed which made him the richest man in the world, at the same time it’s his greed which made the society unbalanced and unequal. He is not bothered about the limitations of one’s actions and breaching the rules of nature for self-fulfilment. His desire of becoming bigger than others has changed the destiny of mankind.

For many of us who live in a land of abundance, greed is not a sin, it is not even considered wrong, instead we now live in a world where we have idolized greed and use all kinds of glamorous names that make it look fashionable and desirable. Being wealthy is not wrong in itself, but glorifying the desire for wealth is terrible. We are privileged and blessed to have things, but the addiction to things can make us very disabled.

Rich Mullins nailed it when he said “It’s a cultural disability in America that we worship pleasure, leisure, and affluence”. Greed is a universal problem and is strongly rooted in our sinful nature; watch how quickly a child learns the word ‘mine’.
Man makes use of everything in their reach to satisfy their greed. One of the things that contribute a lot to their wealth and power is the Earth's own natural resources. Man, unfortunately has exploited these resources beyond the limit. When a country owns more resources, they are automatically richer. They use and sell the resources to develop their country. The greed comes in when different countries compete with one another to have  more development.

The deforestation which has taken place due to commercial exploitation of trees for timber, resin, medicinal herbs, etc., the developing of new agricultural fields, over-grazing by animals, the coming up of new habitation (e.g. because of the construction of the Tehri dam), the building of roads mainly after the China invasion of 1962, tourism development and other development activities, increase in the population (men as well as animals), all have had an adverse affect on the environment and have brought about ecological imbalance.

In the villages of Garhwal there is watershed failure, which has resulted in both drought and flood conditions, soil erosion, landslides, changes in the microclimate, increase in the silting rate which has caused a rise of the river beds, loss of wildlife, drying up of natural springs on which the villagers depend for drinking water. It’s clear that the watershed failure is the result of deforestation which in turn is the result of man’s greed. Finally, the main culprit is the GREED.

The hymn dedicated to the earth in the Atharvaveda (12.1.12) sums up the traditional attitude of reverence:

Impart to us those vitalizing forces

that come, O Earth, from deep within your body,

Your central point, your navel; purify us wholly.

The Earth is mother; I am son of Earth,

The rain-giver is my father; may he shower

on us blessings!

But the values of reverence in the modern man have vapourated. They are degrading the soil by throwing waste wherever they like.This waste is created only because of more consumerism which is the result of greed. Man’s greed make him to buy as many things he wishes, which increases the waste that exploits the Earth. Earth can degrade itself some of the bio-degradable wastes but when it comes on non-biodegradable, toxic and E-waste Earth cannot. In turn the Earth itself is effected.

Farmer’s are also not lagging behind in showing their greed. They sow seeds of other crops immediately after one crop is harvested without giving some time for the soil to regain it nutrients. This kind of agriculture can help farmer make more money but after few years the land looses its fertility and is of no use. This shows how earth can’t satisfy man’s greed.

Every individual, has a responsibility in protecting the environment, if he/she is serious about leaving a world for the next generation to inherit.There is a need now to curb the unhealthy consumption that the world has become slave too as there is a direct link between excessive production and environmental degradation. One clear example is that of the increase in the use of cars with each member of a family claiming the need to own and drive his/her own vehicle. The 700 million automobiles of the world are already using up two-thirds of the gasoline and releasing carbon dioxide that has already ushered in the era of global warming and the greenhouse effect. The desire to control the oil resources has also seen the worst war of the 21st century and one wonders what others will follow with environmentalists warning that the next wars will be those fought over water, which is likely to become a commodity in short supply.

Man is still going on increasing his desires and his greeds and  2 questions are still left unanswered.

Will MAN be able to find another planet in the universe similar to Earth to migrate?
Will MAN be able to alter that planet to make it suitable for our living?

Man o Man poem

Don't know who wrote this.. Hats off to him

Man O Man!
When without money,
eats vegetables at home;
When has money,
eats the same vegetables in a fine restaurant.
.
When without money, rides bicycle;
When has money rides the same ‘exercise machine’.
.
When without money walks to earn food
When has money, walks to burn fat;

Man O Man! Never fails to deceive thyself!
.
When without money,
wishes to get married;
When has money,
wishes to get divorced.
.
When without money,
wife becomes secretary;
When has money,
secretary becomes wife.
.
When without money, acts like a rich man;
When has money acts like a poor man.
Man O Man! Never can tell the simple truth!
.
Says share market is bad,
but keeps speculating;
Says money is evil,
but keeps accumulating.
.
Says high Positions are lonely,
but keeps wanting them.
.
Says gambling & drinking is bad,
but keeps indulging;

Man O Man! Never means what he says and never says what he means..

MATURITY

DISCLAIMER:  Already a lot has been discussed about maturity and I simply have a different take on it. Let's keep it simple. I'll share my perceptions of what maturity is from my personal experiences on various social networking sites. If you're a person seeking happiness and satisfaction from material things, then DO NOT PROCEED.

And for those like me who look the same  things, at the same place but with a different angle, here's what I feel maturity is:

• No status updates

I stopped updating my facebook and whatsapp status, the day I realized, it was absolutely a waste of time seeking approbations and criticisms from the random people.

• No picture uploads

Why am I suppose to publicize with where I've been to, of how beautiful I looked. It's none of other person's business.

• Stopped throwing tantrums

Long back I stopped throwing tantrums like other girls when I realized that people around me desire for things I take for granted.

• An addiction to quora

Finally maturity was when I prioritised my stuff and realized, all social media is worthless and disgusting for a person like me who has high aspirations and a thirst for knowledge.

And all of us " THE QUORANS" discussing and sharing good and intellectual works here, is the best example of being mature.

** From the comments section below what I can make out is people have strong sentiments associated with facebook and whatsapp. I don't have anything against these nor the people who share good posts and their experiences so that it may be of help to others.
What I actually mean by maturity is that bridge with show off on one end and actual knowledge base on the other which many tend to cross in order to seek satisfaction.
It's not possible for me to reply to every comment and so it was better I make myself clear here.
Also from this I'll remark

Maturity is when you understand that each person on this earth has a right to their own perceptions and you cannot seek justifications for the prejudices you hold. Instead you value and respect that. That's the highest form of maturity.

Lifestyle inflation, mindfulness and meditation

A long time ago, a girl I was dating, asked me a question. The question was so bizarre I had to stop everything to digest it.

She asked me when I would start living according to my status.

I was confused. Status? What status? I have a status? What do you mean?

She continued. Well you make decent money. Yet you drive an older car. You live in a poor neighborhood. You should live in a better place and have a better car. You have a status to maintain.

I could not believe it.  I read there are people who buy things to show wealth. Someone is yet to buy a Porsche for fuel economy.

But, to feel an obligation to spend… Spend to meet societal expectations… I have yet to come across that. Why would I spend my money to conform to what others expect of me?  

This brings me to the OP's question. Here's my advice on lifestyle changes to save money. Actually, it's only one change, but it's big. It will save you thousands (if not millions) and will simplify your life tremendously... 

AVOID LIFESTYLE INFLATION

As you move thru various life stages, your income will (hopefully) increase. As your income grows so will your expenses. This is a definition of a lifestyle inflation. 

The increase in expenses is usually part of “keeping up” with peers. Making sure you drive the “right” car, live in the “right” neighborhood, and have kids to go to the “right” school. It’s a status-related spending, a type of conspicuous consumption.

Consider a simple example.  Say, I currently work at a marketing agency. My current salary is $80k/year.  I’ve been doing some great work lately and I got promoted. My salary went up by 30%.

Currently I live in a less glamorous suburb of Detroit, called Madison Heights. I own a 3 bed, 2 bath home, 1450 sq ft.  I bought this house for $145k recently.  My current property tax is $2.6k.

Inspired by my recent financial success, I decided to move to more affluent suburb of Bloomfield township. A "right" neighborhood.

I bought a similar-size 1450 sq ft house,with 3 bed/2 bath, for $227k. My new property tax is $5.5k/year. (By the way, these are real houses and tax rates I found on Real Estate Listings, Homes For Sale, Housing Data.)

Assuming 4% interest rate on my mortgage, $29K down (20% of $145k) and $1k insurance, my payment on the old house is $854. My payment on the new house under the same assumptions is $1,465. 

That’s an increase of $611 (71% hike). (I know that mortgage interest is tax deductible, but that wont change my message if you continue reading.)

Of course, things get worse. There are hidden costs of living in a wealthy suburb.

I notice that my neighbor is driving a BMW 5 series, while I’m still schlepping around in my Ford Fusion. So I decide to get a BMW too.  Here’s the math: Ford Fusion costs $22k, BMW 5 Series starts at $50k. Assuming 6% taxes, no down, and 60 month loan at 2.9%, my payment will go  from $420 to $1,050, about $600 increase (150% hike).

At this point, I have exhausted most of my 30% raise (assuming 30% tax rate, my salary would increase by about 1,400 per month). However, I have access to cheap credit, and I continue to “keep up.” Boats, private schools, plastic surgeries, even lawns are all part of maintaining status.

So, now I’m in debt. My new job is taking more time and energy, since I am getting paid more to work longer hours. I’m stressed out about my monthly payments and I’m overworked.

What should have been a road towards prosperity quickly turns into a highway toward financial ruin.

How to Avoid Lifestyle Inflation?

Here are my actionable strategies.

Stay Away from High-Income Neighborhoods,

There is no way around it. If you think you can live in a wealthy suburb and not engage in a lifestyle inflation, think again. 

We are hard-wired to follow crowds. That’s what ensured our survival in the past. We have mirror neurons in our brain. The sole purpose of these neurons is to mimic other people’s behavior (and choices). Your willpower does not stand a chance against thousands of years of evolution.

Living among affluent residents has another negative consequence. Allow me to illustrate. Say you’ve been saving to buy a car of your dreams. You have been saving for a couple of years.

The car of your dreams is BMW 7 Series (price tag $94k). You finally saved enough and bought your coveted vehicle. As you pull up to your house in a shiny BMW you notice your neighbor just bought Bentley Continental GT ($200k vehicle).  That’s a better, shinier, and more expensive vehicle.

How would you feel towards your BMW now? Are you still excited about it? Probably not. You might even hate it now. What you are experiencing is called relative deprivation. 

It is relative, because your car (while being very expensive) is worse than the Bentley. It is deprivation because you think you are entitled to have the Bentley as well. But you cannot afford it.

The irony is you just bought a $100k car and yet you feel poor. 

Un-freak-believable.

Reduce Advertising Exposure

There are two problems with advertising.First, it puts ideas in your head. It does so subtly.

When you are exposed to advertising as an adult, you have enough critical reasoning skills to question its premise. If you want to question it, of course (many people don’t).

However, if you were exposed to advertising as a kid, you grew up accepting these ideas without questioning. You grow up thinking you have to maintain status, for example.  Buy diamonds. Wear a Rolex.

Advertising has been successful inpropagating the idea that you deserve/worth/entitled to (insert an item). The message is so widespread and common,we get comfortable with the notion that self-worth = having/buying something.  And that you have to spend to maintain or show your worth.

This strategy, especially, works for things we don’t really need: Jewelry, beauty products, luxury items.

That’s why the advertising strategy for these products is to link spending to self-esteem,or to self-worth. Consider this famous example:

Here, your worth is explicitly linked to a product. As a product gets more expensive the link gets more subtle, more nuanced. Here’s an example:

Here, the relationship between the product and self-esteem is less explicit. Bill Gates is important -> has Rolex watch -> are not you important? -> get Rolex watch too.  And, just like L’oreal, Rolex managed to put the word “worth” in the ad.

I like the watch ads especially because you can buy a watch for $10 in Walmart. Functionally, this watch is no different from a Rolex.  Also, almost everyone has a cell phone, and it has watch in it. You don’t really need one now.

So to make someone spend thousands on watch you have to really dig deep inside the person’s psyche.  Here’s another one. This watch will show everyone what you are made of… Who you really are…

Do you see a pattern?

Because there’s no limit to your importanceor self-esteem, you will keep spending to uphold it. Brilliant strategy.

The largest source of advertising is TV. Stop watching TV.

Another problem with advertising is it encourages over-consumption.  It induces you to buy shit you don’t need. Or at least don’t need right now. You can drive your car for another year, but you can get a C Class Mercedes for only $399/month if you act now! At these prices, you lose if you don’t buy!

Practice Mindfulness (Buddhism)

Completely different strategy, albeit the weird one.

Let me preface. I’m not telling you to change your religion or join a Tibetan monastery.

Moreover, I’m not a Buddhist (I do mediate). I just take what I need from the doctrine and leave everything else out. So, I will list a couple of relevant concepts from Buddhism and a specific technique on how to put them in place. I’ll list resources below my post if case you need to read more.

First, the mindfulness teaches us to accept the present situation. We all spend hours imaging how different our life would be if we had something we don’t have right now. Better spouse, better house, better car, more money, more stuff, etc, etc.

One book described this tendency as a “mental time travel.” Not only does mental time traveling rob us from real-life experiences. It actually makes us miss real life.

Practicing mindfulness will make you more content with what you have. And importantly, with what you don’t have.

Second, Buddhism teaches us that there’s no concept of self. It’s an artificial construct of the thinking mind. The thinking mind is part of the mind that generates thoughts. It’s a part that’s responsible for continuous chatter in your brain. 

Since we are the product of our thoughts,and those come and go, the idea of self is a response of the thinking mind to make us feel more permanent. 

The implication of this is intriguing.

Imagine how many times do you get tortured by inner critic for not being good enough? In comparison to your ex, your ex’s boyfriend, your coworker, your friend. You are not as successful, not as thin, not as smart, not as rich, not as strong, not as beautiful, not as fit, etc etc. All these thoughts are the product of continuous comparison of your self to others. Now imagine, there is no self. 

Suddenly, all this mental torment is gone. After all, if there is no self, then all thiscomparison is meaningless.

And all those ads targeting your ego are suddenly useless as well.

Finally, purchasing decisions (especially decisions to buy status items) are inherentlyemotional. Say you want to buy a watch. Functionally speaking, there is no difference between Timex and Rolex. Yet, the decision to buy Rolex is more emotional.

How Does Mindfulness Work

The part of the brain in charge of emotions is called the amygdala. It is a more primal part of the brain; it evolved first and is found even in reptilians.

Research showed that Buddhist monks have smaller amygdalae and much thicker pre-frontal cortices. The pre-frontal cortex handles concentration, awareness, and decision making. The pre-frontal area has evolved recently (evolutionary speaking) and is found in mammals (i.e in more complex brains).

Furthermore, the functional connection (times the areas of the brain move together) between amygdala/pre-frontal cortex and the rest of the brain gets weaker/stronger. Basically, your higher level areas of the brain start dominating lower-level areas. You are managing your emotions/feelings/compulsions better.

The scale and magnitude of changes are directly correlated to the number of meditation hours.

Which brings us to my next point. There’sonly one way to attain these benefits. It’smeditation.

Meditation is sitting down with your eyes closed and concentrating your attention on your breath. Your attention will wander from time to time, and you gently bring it back. Look at the resources at the end for more information.

Meditation is a deliberate practice to disassociate yourself from your thoughts. It took me about 2 years to understand that.

When I first started meditating I thought the goal was not to have any thoughts. I was wrong.

The goal is to watch your thoughts without identifying with them.  Buddhists compare the process to sitting on a side of the highway and watching cars passing by. Sometimes you jump on one of them and it takes you down the highway.  But then you remember, get off, and watch cars passing you by again.

As I practiced my meditation, I became aware of what was going on in my head. I startrealizing that my thoughts are not me. They just come and go and some of them make me feel a certain way. I don’t have to react to them, though I often do.

If I learn that my neighbor has just bought a new car. Or my coworker made more money than I did, I observe thoughts that pop up in my head. I see them come and go and I notice how they make me feel. I also remind myself these ideas and emotions are not me. If Ichoose to identify with them, I let these ideas hijack my mind. I let them define me.

I used to ruminate about injustices (either perceived or real) I had in my life and people who caused them. I would get angry and filled with rage as I replayed these situations again and again. When these ruminations happen now, I ask myself if I am being taken for a ride.

I still get angry/mad/jealous/upset, but the intensity of emotions is weaker and its duration is shorter.

If you practice meditation on a regular basis, it will make you content, accepting of yourself, and emotionally stable.  You are less likely to overspend, make a bad financial decision, or engage in compulsive shopping. Meditation has the potential to benefit you in other aspects of life as well.

Unfortunately, this strategy requires time and determination. For it to work, it has to become a habit. But, it took years to become who you are, so it will take years to change how you think.

Resources:This app helped me to build a regular daily practice (not affiliated link): HeadspaceMeditation impact on brainWhat is mindfulness?