The truth is not always what we want to hear, but it is what we need to know.

Man is the measure of all things.

"To lose one parent may be regarded as a misfortune; to lose both looks like carelessness."

But the eyes are blind. One must look with the heart.

You have to be willing to be misunderstood if you are going to innovate.

Don't bend; don't water it down; don't try to make it logical; don't edit your own soul according to the fashion. Rather, follow your most intense obsessions mercilessly.

学习数学的唯一方法就是做数学。