As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.
And the thing about a successful life is that a lot of the time, our ideas of what it would mean to live successfully are not our own. They're sucked in from other people; chiefly, if you're a man, your father, and if you're a woman, your mother. Psychoanalysis has been drumming home this message for about 80 years. No one's quite listening hard enough, but I very much believe it's true.
The presence of those seeking the truth is infinitely to be preferred to the presence of those who think they've found it.
"Happiness is not something ready-made. It comes from your own actions."
The only way to learn mathematics is to do mathematics.
The revolution is a long and arduous struggle, but with determination and unity, victory is certain.
革命是一场漫长而艰苦的斗争，但只要有决心和团结，胜利是必然的。
The study of psychology is the study of life's problem-solving mechanisms.