“We were once fish! We spent millions of years under the water in silence. That’s why now we love talking continuously!”

“Once upon a time you were a fish. How do you know? Because I was also a fish. You, too? Sure. A long time ago. Anyway, being a fish, you knew how to swim. You were a great swimmer. A champion swimmer, you were. You loved the water. Why? What do you mean, why? Why did I love the water? Because it was your life! And as we talked, I would have let him go one finger at a time, until, without his realizing, he'd be floating without me. Perhaps that is what it means to be a father-to teach your child to live without you.”

“(On the energy radiated by the Sun)It's four hundred million million million million watts. That is a million times the power consumption of the United States every year, radiated in one second, and we worked that out by using some water, a thermometer, a tin, and an umbrella. And that's why I love physics.”

“We spent all those years talking about stuff we had in common, and the last few months noticing all the ways we were different and it broke both of our hearts.”

“Was it only that explosion of atavism which is now evasively called "the cult of personality" that was so horrible? Or was it even more horrible that during those same years, in 1937 itself, we celebrated Pushkin's centennial? And that we shamelessly continued to stage those self-same Chekhov plays, even though the answers to them had already come in? Is it not still more dreadful that we are now being told, thirty years later, "Don't talk about it!"? If we start to recall the sufferings of millions, we are told it will distort the historical perspective! If we doggedly seek out the essence of our morality, we are told it will darken our material progress! Let's think rather about the blast furnaces, the rolling mills that were built, the canals that were dug... no, better not talk about the canals.... Then maybe about the gold of the Kolyma? No, maybe we ought not to talk about that either.... Well, we can talk about anything, so long as we do it adroitly, so long as we glorify it....”

“But why live in these environments at all? What possessed fish to get out of the water or live in the margins? Think of this: virtually every fish swimming in these 375-million-year-old streams was a predator of some kind. Some were up to sixteen feet long, almost twice the size of the largest Tiktaalik. The most common fish species we find alongside Tiktaalik is seven feet long and has a head as wide as a basketball. The teeth are barbs the size of railroad spikes. Would you want to swim in these ancient streams?”