I have to say to myself that some birds aren't very close. Their feathers are just too bright. When they fly away, you know it's a sin to lock them up, and you'll be inspired by them. Still, the place you live in is that much more drab and empty that they're gone. I think I really miss my friends.

Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one.

Making something variable is easy. Controlling duration of constancy is the trick.

成功不是终点，失败也并非致命，重要的是继续前进的勇气。

每一种化学结合完全且仅仅依赖于两种对立的力量，即正电和负电。