“Try to understand why a transaction makes sense to your counterparty....”

Source: The Virgin Suicides

Source: Al Capone Does My Shirts

Source: On the Jellicoe Road

On an article by Qunta magazine(when asked: Is there one big question that has always guided you?) https://www.quantamagazine.org/michael-atiyahs-mathematical-dreams-20160303
Context: I always want to try to understand why things work. I’m not interested in getting a formula without knowing what it means. I always try to dig behind the scenes, so if I have a formula, I understand why it’s there. And understanding is a very difficult notion. People think mathematics begins when you write down a theorem followed by a proof. That’s not the beginning, that’s the end. For me the creative place in mathematics comes before you start to put things down on paper, before you try to write a formula. You picture various things, you turn them over in your mind. You’re trying to create, just as a musician is trying to create music, or a poet. There are no rules laid down. You have to do it your own way. But at the end, just as a composer has to put it down on paper, you have to write things down. But the most important stage is understanding. A proof by itself doesn’t give you understanding. You can have a long proof and no idea at the end of why it works. But to understand why it works, you have to have a kind of gut reaction to the thing. You’ve got to feel it.

1970s, Economics for the Citizen (1978)
Context: there's the claim that this or that price is unreasonable. I used to have conversations about this claim with Mrs. Williams early on in our 44-year marriage. She'd return from shopping complaining that stores were charging unreasonable prices. Having aired her complaints, she'd ask me to go out and unload a car trunk loaded with groceries and other items. Having completed the chore, I'd resume our conversation, saying, "Honey, I thought you said the prices were unreasonable. Are you an unreasonable person? Only an unreasonable person would pay unreasonable prices." The long and short of it is that the conversation never went over well, and we both ceased discussions of reasonable or unreasonable prices. The point is that whatever price a transaction is transacted at represents a meeting of the mind of both buyer and seller. Both viewed themselves as being better off than the next alternative -- not making the transaction. That's not to say that the seller wouldn't have found a higher price more pleasing or the buyer wouldn't have been pleased with a lower price.

Source: Nothing to Lose But Your Life: An 18-Hour Journey With Murad