数学之美不仅在于其抽象的优雅，还在于其建模和解决现实世界问题的深刻能力。
热力学第二定律只不过是一个统计定律。
解释：自己行为不端的人就难以要求别人行为端正，不孝顺父母的人也不能忠于君主。
I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.
Books say: She did this because. Life says: She did this. Books are where things are explained to you; life is where things aren’t.
The artist must be a stranger to the world.