语言不是描述现实的工具，而是现实本身。

追求科学不是一种奢侈，而是人类生存的必要条件。

Three grand essentials to happiness in this life are something to do, something to love, and something to hope for.

在自然状态下，利益是权利的尺度。

Don't bend; don't water it down; don't try to make it logical; don't edit your own soul according to the fashion. Rather, follow your most intense obsessions mercilessly.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

I’m not afraid of dying, I’m afraid of not trying.

Psychological theories must pass the test of practical experience.