The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

If you want to make a bond, you are to take the risk of tearing.

关于MM定理最重要的事情不是它的现实性，而是它的简单性。

物理学的美丽在于它能够用简单的原理解释复杂的事物。

好的教育中，一半的技能，是学会鉴别“哪些事物应被直接忽略掉”这样的能力。