大脑就像肌肉一样，当我们使用时会感到愉悦。理解是充满欢乐的。
The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.
如果你让人们稍微进入你的生活，他们可能会非常了不起。
In science, we must be interested in things, not in persons.
My life I never held but as a pawn to wage against your enemies.
The art of disputation is the art of making the worse appear the better reason.