The reward of a thing well done is to have done it.

Certification programs are more than stickers on wood products; they represent a promise to our planet.

The best way to predict the future is to create it.

We do not see things as they are; we see them as we are.

除非定理是美丽的，否则它们毫无价值。

学习写作的唯一方法就是写作。