Do the right thing, not the easy thing.
做正确的事,而不是容易的事。
数学不知道种族或地理边界;对于数学来说,文化世界是一个国家。
自然在其现象中向我们展示了无限的多样性,但也展示了令人钦佩的简单性。
Life is like a piano. The white keys represent happiness and the black keys show sadness. But as you go through life's journey, remember that the black keys also create music.