You have to spend some energy and effort to see the beauty of math.

未来属于那些敢于冒险和与众不同思考的人。

When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.

Liberty is the fruit of thought.

驴子想的是一样，赶驴的人想的却是另一样。

Happiness is as a butterfly which, when pursued, is always beyond our grasp, but which if you will sit down quietly, may alight upon you.