【释义】处于安乐之境要想到危险，想到了就有准备，有准备就能避免祸患。

The most profound truths are often the ones we avoid.

When you forgive others, they may not notice, but you will heal. Forgiveness is not something we do for others; it is a gift to ourselves.

我们必须投资于不仅能提高效率而且能减少环境影响的技术。

发散级数是魔鬼的发明，基于它们的任何证明都是一种耻辱。