经验的直接内容是心理学必须考虑的唯一事实。

To be loved, be lovable.

The only way to save a rhinoceros is to save the environment in which it lives, because there's a mutual dependency between it and millions of other species of both animals and plants.

"We are all fools in love."

Ignorance more frequently begets confidence than does knowledge.

痛苦是一扇门，通向比它本身更伟大的东西。