Which is why I am writing this book. To think. To understand. It just happens to be the way I'm made. I have to write things down to feel I fully comprehend them.

Most human activities are predicated on the assumption that life goes on. If you take that premise away, what is there left?

Two-thirds of earth's surface is ocean, and all we can see with the naked eye is the surface.

The sense of tragedy - according to Aristotle - comes, ironically enough, not from the protagonist's weak points but from his good qualities. Do you know what I'm getting at? People are drawn deeper into tragedy not by their defects but by their virtues. ... [But] we accept irony through a device called metaphor. And through that we grow and become deeper human beings.

...most people in the world don't really use their brains to think. And people who don't think are the ones who don't listen to others.

Everybody's born with some different thing at the core of their existence. And that thing, whatever it is, becomes like a heat source that runs each person from the inside. I have one too, of course. Like everybody else. But sometimes it gets out of hand. It swells or shrinks inside me, and it shakes me up. What I'd really like to do is find a way to communicate that feeling to another person.

Math is like water. It has a lot of difficult theories, of course, but its basic logic is very simple. Just as water flows from high to low over the shortest possible distance, figures can only flow in one direction. You just have to keep your eye on them for the route to reveal itself. That’s all it takes. You don’t have to do a thing. Just concentrate your attention and keep your eyes open, and the figures make everything clear to you. In this whole, wide world, the only thing that treats me so kindly is math.