The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.
投机把你引向错误的道路。它允许你把你的情绪放在第一位,而投资则把情绪排除在外。
给学生一些事情去做,而不是一些东西去学;而这些事情的性质需要思考;学习会自然而然地发生。