Courage consists not in hazarding without fear； but being resolutely minded in a just cause.

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.

经济理论提供工具，但现实世界的测试会完善它们。