君子不以水为镜,而以人为镜。以水为镜,只能看到面容;以人为镜,可以知道吉凶。
That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
The world is always right. In its judgments, it is always right. Because it is the world.
密码学的艺术是使破解系统的成本超过受保护信息的价值。
Political language... is designed to make lies sound truthful and murder respectable, and to give an appearance of solidity to pure wind.
The chemical industry is the backbone of modern civilization, and we must treat it with the responsibility it deserves.