Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.

Neither power nor wealth, only the scepters of art endure.

我们都是进化之树上的叶子。

学习是系统中产生的任何变化，这种变化或多或少会永久性地改变其适应环境的能力。

Only those who are proactive can win success in the rapidly changing competitive environment, and only those who are good at showcasing themselves can get real opportunities at work.

Power resides where men believe it resides. It's a trick, a shadow on the wall. 

"A book is a fragile creature, it suffers the wear of time, it fears rodents, the elements and clumsy hands. So the librarian protects the books not only against mankind but also against nature and devotes his life to this war with the forces of oblivion."