A man who dares to waste one hour of time has not discovered the value of life.

The most dangerous enemy is often ourselves.

The only thing you absolutely have to know is the location of the library.

I don't think that everyone should become a mathematician, but I do believe that many students don't give mathematics a real chance.

The best art is the art that changes you.

我不知道有谁比我更需要一个拥抱。