I'm not trying to be cool. I'm just being myself.

Certification standards are the compass for responsible forestry.

Change is hardest in the beginning, messiest in the middle, and best at the end.

你不必具备量子力学所要求的能力。你只需要知道一些简单的事情，并真正了解它们。

The beauty of a mathematical idea is that it can be shared and understood across cultures and time.

魔鬼不需要长角才危险。