Learning is not a matter of trial and error, but of insight.
If you want to go fast, go alone. If you want to go far, go together.
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.
预测未来的最好方法就是发明它。
摆脱诱惑的唯一方法就是屈服于它。