出自《抱朴子·博喻》。登高的人，要警惕的是爬高了会摔下来，渡深水的人，往往是因为船太重才出了祸。要适可而止，不要过于贪婪。

每首歌都有自己的生命。

The key to successful investing is to have a long-term perspective, a disciplined approach, and a clear understanding of the market.

活力和毅力能战胜一切。

The joy of discovery in mathematics is unparalleled.