I don't have time to hate people who hate me because I'm too busy loving people who love me.

I'm not running from my past; I'm running toward my future.

Great truths are even more simple than I thought they were....

As in geometry the most natural way of beginning is from a mathematical point, so is the same method in observations and natural history the most genuine, simple, and instructive.

生活的艺术在于克服困难而不战胜它们。

Courage isn't the absence of fear, but the will to keep going.

The structure of DNA was a puzzle that demanded to be solved.