Desire is not a thing to be understood, it is a force to be reckoned with.

The science of government it is my duty to study, more than all other sciences; the arts of legislation and administration and negotiation ought to take the place of, indeed exclude, in a manner, all other arts.

All mankind... being all equal and independent, no one ought to harm another in his life, health, liberty, or possessions.

天才不会犯错。他的错误是自愿的，是发现的门户。

目的赋予心理活动意义。