Don't stop when you're tired. Stop when you're done.

The historian is a prophet looking backwards.

理解绘画的唯一方法是长时间地观看它。

As long as the world shall last there will be wrongs, and if no man rebelled, those wrongs would last forever.

我越是坚决地以自我存在于时代的条件中，我就越清晰地听到过去的语言，越感受到世纪的气息。

心理学必须摆脱一切形而上学的纠缠。