“Life is not like water. Things in life don't necessarily flow over the shortest possible route.”

“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.”

“Of course life frightens me sometimes. I don't happen to take that as the premise for everything else though. I'm going to give it hundred percent and go as far as I can. I'll take what I want and leave what I don't want. That's how I intend to live my life, and it things go bad, I'll stop and reconsider at that point. If you think about it, an unfair society is a society that makes it possible for you to exploit your abilities to the limit.”

“It's my motto for life. 'Walk slowly; drink lots of water.”

“I don't think it's a question of liking or disliking it," Tengo said..."It was the one thing he was best at." "Hmm. I see," Kumi said. She pondered this. "But that might very well be the best way to live your life.”

“Life is here, death is over there. I am here, not over there.”

“I don't really know if it's the right thing to do, making new life. Kids grow up, generations take their place. What does it all come to? More hills bulldozed and more ocean fronts filled in? Faster cars and more cats run over? Who needs it?”