If you don't like something, change it. If you can't change it, change your attitude.
如果你不喜欢某件事，就去改变它。如果你无法改变它，就改变你的态度。
学习数学的唯一方法就是做数学。
To All, only love is the best teacher, it is far better than the responsibility.
In republican governments, men are all equal; equal they are also in despotic governments: in the former, because they are everything; in the latter, because they are nothing.
制革厂的遗产应以其对环境的守护来衡量。
我对超自然存在的想法，就像我对数学的想法一样产生。因此我认真对待它们。
The difference between a moral man and a man of honor is that the latter regrets a discreditable act even when it has worked.
Mental phenomena are tools in the service of life.
讲诚信，是天下行为准则的关键。