The world may be mean, but people don’t have to be, not if they refuse.

The mathematician's patterns, like the painter's or the poet's, must be beautiful; the ideas, like the colors or the words, must fit together in a harmonious way.

诗人的使命是照亮黑暗。

The best time to start taking control of your life is now.

The strength of a response tendency depends on the amount of reinforcement received.

当你拥有优秀公司的股票时，时间是你的朋友。