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Wisdom acquisition is a moral duty. It’s not something you do just to advance in life. And there’s a corollary to that proposition which is very important. It means that you’re hooked for lifetime learning, and without lifetime learning you people are not going to do very well. You are not going to get very far in life based on what you already know.

The truth is always elsewhere.

最危險的毒藥是成就感。解藥是每天早上都像個初學者一樣思考。

Psychology must be a science of description, not explanation.

Happiness is holding someone in your arms and knowing you hold the whole world.

國際政治是一項殘酷而危險的業務，期望國家按照道德原則行事是愚蠢的。