It is human nature to think wisely and act foolishly.
译文：自己平静内心就可延长寿命，不贪求物欲便可精神旺盛。赏析：做任何事都要冷静，放平心态，追求物质生活没有错，但有时也需要顺其自然。
信じることは、時には怖いことだ。
A fool who knows he is a fool is for that very reason a wise man. The fool who thinks he is wise is the one to be called a fool.
Mathematics is the language in which the gods talk to people.