幸福的关键因素并非是物质的或审美的，而永远是心理上的。《旅行的艺术》
A non-writing writer is a monster courting insanity.
The most important political distinction among countries concerns not their form of government but their degree of government.
To this war of every man against every man， this also in consequent； that nothing can be unjust.The notions of right and wrong， justice and injustice， have there no place.Where there is no common power， there is no law: where no law， no injustice.
战略管理不是一门科学，而是一门艺术。