Success is not final, failure is not fatal: It is the courage to continue that counts.

我不想成为英雄。我只想成为一个做正确事情的人。

真正的数学家始终是学生，永远在学习。

The only way to do great work is to love what you do.

地质学的进步因用想象的原因代替真实的原因而大大受阻。