The natural effort of every individual to better his own condition， when suffered to exert itself with freedom and security， is so powerful a principle that it is alone， and without any assistance， not only capable of carrying on the society to wealth and prosperity but of surmounting a hundred impertinent obstructions with which the folly of human laws too often encumbers its operations.
一般來說，嫉妒、怨恨和自憐都是災難性的思想模式。自怨自艾與偏執(zhí)狂相當接近，而偏執(zhí)狂是最難扭轉的。
"A room without books is like a body without a soul."