The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling, are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest, are the traits of success.
The greatest use of a life is to spend it for something that will outlast it.
学习数学的最好方法就是做数学。