The whole problem with the world is that fools and fanatics are always so certain of themselves， and wiser people so full of doubts.
世界的整个问题在于愚蠢的人和狂热分子总是对自己如此确定，而聪明的人则充满疑虑。
如果你不害怕，你会做什么？
The less you know, the more you believe.
心理学应该阐明心灵的实际运作，而不仅仅是剖析其部分。
Critical comments by students should be taken in a friendly spirit， accumulation of material should not stifle the student’s independence.
在我看来，一种信仰只是一个信仰现象，信仰的内容无足轻重。
The more I see of the moneyed classes, the more I understand the guillotine.