Every mark on the paper is a political act.

Innovation in mining isn't optional - it's essential for our future.

学习数学的唯一方法就是做数学。

Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.

The truth is like the sun. You can shut it out for a time, but it ain't goin' away.