The history of mathematics is a history of human thought and progress.

光线不断变化，每分钟都在改变事物的氛围和美感。

Mathematics is the art of giving the same name to different things.

The real is not only what can be reproduced, but that which is always already reproduced.

Don’t wait for opportunities—create them.

我们越爱我们的朋友，就越少奉承他们；纯粹的爱表现在毫不包庇的态度。