Making something variable is easy. Controlling duration of constancy is the trick.

"No hay nada más peligroso que un hombre que no tiene nada que perder."

"The very essence of romance is uncertainty."

The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

这是圣王的法则，治理天下的正道，不可不努力去做！ 

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