"I don't think of myself as a photorealist. I think of myself as a realist painter."

I'm not a light, I'm a darkness.

With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.

"Parental investment is the key to understanding the origins of sex differences."

Everything is a learning process: any time you fall down, you get up and you learn from it.

永远不要停止学习，因为世界永远不会停止变化。