无根本底气节，如酒汉欧人，醉时勇，醒来退消无分毫气力；无学问底识见，如庖人炀灶，面前明，背后左右无一些照顾。
没有根本的气节，就好像醉汉喝醉酒打人，酒醉时很勇敢，酒醒后勇气全消，没有一点气力。没有以学问为根本的见识，就好像厨师在炉灶前面，面前光亮而背后黑暗。
拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到对称性和拓扑的保护，使它们对某些类型的无序免疫。
I don't try to predict the future. I just try to buy stocks that are cheap relative to their value.
"The world is a game, but the rules are unfair."
The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.