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.
【译文】 孔子说：“君子坦荡而不骄狂，小人骄狂而不坦荡。”
Every year of delay makes the problem harder to solve.
The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are indistinguishable from it.