The greatest mysteries are those we create ourselves.

你看，在生活中，很多人知道该做什么，但很少有人真正去做他们知道的事情。知道是不够的！你必须采取行动。

There is, I believe, in every disposition a tendency to some particular evil, a natural defect, which not even the best education can overcome.

Psychology must be based on observable phenomena, not abstractions.

Innovation starts with asking, ‘What if?’

经典是一本永远没有说完自己话的书。