Psychology must be a science of facts, not theories.

The metropolis exacts from man as a discriminating creature a different amount of consciousness than does rural life.

The only way to understand painting is to look at it for a long time.

对我来说，绘画与色彩无关；我感兴趣的是光的质感。

最优秀的科学家是那些在自然的复杂性面前保持谦逊的人。