Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.
The most important thing is to have a child. Everything else is secondary.
"The best stories are the ones that make you feel something."
The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.
量子力学的美在于它能够描述最小尺度下粒子的行为，即使它违背了我们的经典直觉。
——在遗嘱上签名后，对在病榻的同志们说，1925年3月11日
