All things excellent are as difficult as they are rare.

Hatred is increased by being reciprocated, and can on the other hand be destroyed by love.

I should attempt to treat human vice and folly geometrically... the passions of hatred, anger, envy, and so on, considered in themselves, follow from the necessity and efficacy of nature... I shall, therefore, treat the nature and strength of the emotion in exactly the same manner, as though I were concerned with lines, planes, and solids.

Big fish eat small fish with as much right as they have power.

Sin cannot be conceived in a natural state, but only in a civil state, where it is decreed by common consent what is good or bad.

The eternal wisdom of God ... has shown itself forth in all things, but chiefly in the mind of man, and most of all in Jesus Christ.

The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.