有时最艰难的战斗发生在我们内心的沉默中。

The only thing that can make you happy is your own smile.

In the world of mathematics, imagination is more important than knowledge.

It is not a lack of love，but a lack of friendship that makes unhappy marriages.

The best investments are those that power both economies and ecosystems.

The only thing that really matters is the relationships that we have.

文学的目的是将血液转化为墨水。