心理学必须基于可观察的现象，而非抽象。

I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

The opera is a beautiful and irrational world. One could spend a lifetime listening and still not understand everything.

【释义】人总是因为自以为是，反而因此互相指责、诋毁。

生活从来不是公平的……而且，或许对我们大多数人来说，这是件好事。