Kindness is the greatest wisdom.
善良是最伟大的智慧。
In mathematics, the simplest questions often lead to the most profound discoveries.
The whole of life is just like watching a film. Only it's as though you always get in ten minutes after the big picture has started, and no-one will tell you the plot, so you have to work it out all yourself from the clues.
Do not do to others what angers you if done to you by others.