There is no such thing as a special category of science called applied science; there is science and its applications, which are related to one another as the fruit is related to the tree that has borne it.

Psychology should illuminate how we cope with our environment.

Every mathematical problem has a solution, but not every solution is immediately apparent.

【释义】一寸大的小火苗，能够将云梦那片广袤的地区烧毁。一个小小的蚁穴能够使得大地崩坍。【延伸】小的祸患最终能够酿成大的灾祸。小毛病往往可以导致大麻烦，优秀的人就是把简单的事做到百分之百完美，细节决定成败。5

玉米是必需品，银子只是多余的。

We have to be willing to change and adapt to the new reality.

Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.