所有的暴力都包含一些人强迫另一些人，在痛苦或死亡的威胁下，做他们不想做的事。

To read is to travel without moving.

Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves.

心理学家必须是一个中立的观察者。