You can fool all the people some of the time, some of the people all the time, but you cannot fool all the people all the time.

The best moments in our lives are not the passive, receptive, relaxing times… The best moments usually occur if a person’s body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.

数学是一门艺术，作为艺术家，你必须对自己诚实。