The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

【释义】不做那些自己不该做的事，不要贪图那些不属于自己的东西。

We don’t try to predict the future. We try to buy things that are cheap.

Don't criticize what you can't understand.

当我们保护海洋生态系统时，我们最终是在保护人类的生计。