The goal is not perfection but progress.

There is no easy walk to freedom anywhere, and many of us will have to pass through the valley of the shadow of death again and again before we reach the mountaintop of our desires.

True innovation often comes from unexpected directions.

Do not do to others what angers you if done to you by others.

Education’s rewards are too distant when today’s survival is urgent.

魔鬼最大的诡计是让世界相信他并不存在。

蛇必须蜕皮才能成长。