Man is the measure of all things: of things which are, that they are, and of things which are not, that they are not.
人是万物的尺度：对于存在的事物，它们存在；对于不存在的事物，它们不存在。
求学的最大益处，在于自我追求改变气质。
I don't think you should ever settle for anything less than what you deserve.
"The wise man learns more from his enemies than the fool from his friends."
Old minds are like old horses; you must exercise them if you wish to keep them in working order.
相对论不仅仅是一个科学理论，而且是一个哲学理论。