苦难！我们所有美好的品质、生命中的价值都归功于它；我们因它而怜悯，因它而勇敢，因它而拥有所有美德。
"In a world without God, we must create our own meaning, even if it is ultimately meaningless."
最大的错误就是以为自己无所不知。保持谦逊，不断学习。
给学生一些事情去做，而不是一些东西去学；而这些事情的性质需要思考；学习会自然而然地发生。
Productivity is often a distraction. Don’t aim for better ways to get through your tasks as quickly as possible， rather aim for better tasks that you never want to stop doing.
There is nothing in the world so irresistibly contagious as laughter and good humor.
