一个思想的价值在于它对行为的后果。

宇宙的扭曲面——黑洞、虫洞、奇点等——对我如此吸引，因为它与日常生活中的平坦欧几里得几何如此不同。

Writing is a way of being in the world, a way of understanding it.

When a person realizes he has been deeply heard, his eyes moisten. I think in some real sense he is weeping for joy. It is as though he were saying, "Thank God, somebody heard me. Someone knows what it's like to be me."

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.