"The only way to learn mathematics is to do mathematics."
学习数学的唯一方法就是做数学。
Don't think. Thinking is the enemy of creativity. It's self-conscious and anything self-concious is lousy. You can't try to do things. You simply must do things.
"The biographer's task is to illuminate, not to judge."
The art of invention consists in finding out the causes of known effects.