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.

The deepest theorems often have the simplest proofs - if you look at them from the right angle.

我既不肯定也不否定，而是暂时保持怀疑。