People who treat other people as less than human must not be surprised when the bread they have cast on the waters comes floating back to them, poisoned.

心理学理论的价值是由其实用性衡量的。

A mathematician's work is never done; there are always new questions to ask and new mysteries to solve.

我对超自然存在的想法，就像我对数学的想法一样产生。因此我认真对待它们。