Psychology is a science, and teaching is an art; and sciences never generate arts directly out of themselves.

Out, out, brief candle! Life's but a walking shadow, a poor player That struts and frets his hour upon the stage And then is heard no more. It is a tale Told by an idiot, full of sound and fury, Signifying nothing, 

挡在你和目标之间的唯一东西是你不断告诉自己为什么无法实现它的故事。

教育的第一步是了解孩子。

自动控制的艺术在于正确调整修正力。