故经之以五事，校之以计，而索其情：一曰道，二曰天，三曰地，四曰将，五曰法。
释义：从五个方面分析形势：政治、天时、地利、将领、法制。
失去某人，最糟糕的莫过于，他近在身旁，却犹如远在天边。
好奇心是每一次重大科学突破背后的驱动力。
Profitability and responsibility must go hand in hand.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.