心理学是科学，教学是艺术；科学永远不会直接从自身产生艺术。
Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.
"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."
自由的概念与真理的概念不可分割。
过去并未死去，它甚至还未过去。
Truth is not spoken in anger. Truth is spoken, if it ever comes to be spoken, in love.
A good programmer is someone who always looks both ways before crossing a one-way street.
儿童通过自立获得身体的独立；通过自由的使用其选择能力获得意志上的独立；通过没有干扰的独立工作获得思想上的独立。