The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
我打球不是为了被记住,而是为了激励他人。
As you grow older, you will discover that you have two hands, one for helping yourself, the other for helping others.
没有任何对象的存在是不容置疑的。
You have to be comfortable with being uncomfortable if you want to make progress in mathematics.