Force and fraud are in war the two cardinal virtues.

数学的本质不仅在于解决问题，还在于提出正确的问题。

The mind is everything; what you think, you become.

Happiness is not something ready made. It comes from your own actions.

Your time is limited, so don't waste it living someone else's life. Don't be trapped by dogma—which is living with the results of other people's thinking. Don't let the noise of others' opinions drown out your own inner voice. And most important, have the courage to follow your heart and intuition. They somehow already know what you truly want to become. Everything else is secondary.

真相不在光明中，而在我们不敢探索的阴影里。