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。
The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.
最可怕的时刻总是在你开始之前。
Order is the shape upon which beauty depends.
思想的清晰性是通向哲学严谨性的第一步。