知足常乐，终身不辱。
贪心不足蛇吞象，知足才能心安。
在观测天文学中，耐心是关键，有些发现需要几十年才能确认。
The trouble with lying is that you have to remember everything.
The greatest enemy of a trader is hope. Hope is what keeps you in a losing trade.
The only thing to do with good advice is to pass it on. It is never of any use to oneself.