The most dangerous phrase in business is "We've always done it this way."
To study ancient DNA is to converse with the dead.
生活就是当你忙于制定其他计划时发生的事情。
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.