The purpose of business is to make a positive impact, not just a profit.
The only thing that's really important is whether the work moves you or not.
Mathematics is the language with which God has written the universe.
In the depth of the valley is the road to salvation.
每个人都有属于自己的故事。
You must not think that what is hard for you to master is humanly impossible； and if it is humanly possible， consider it to be within your reach.