Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

If you don't keep creating, you will disappear.

We are to remember that we are not to take anything with us out of this world, and that it is how we have conducted ourselves here that will matter in the end.

在困难中蕴藏着机会。

在追求数学真理的过程中，我们常常发现更多的问题而非答案。