有时保持理智的唯一方法就是偶尔发疯。
Sometimes the only way to stay sane is to go a little crazy sometimes.
What we call National-Socialism is the poisonous perversion of German ideas.
A mathematician's work is never done; there are always more problems to solve.
Always plan ahead. It wasn’t raining when Noah built the ark.
最好的出路永远是穿过去。