Let us not go over the old ground but rather prepare for what is to come.

Aristoteles quidem ait: 'Omnes ingeniosos melancholicos esse.' Aristotle says that all men of genius are melancholy.

The searching-out and thorough investigation of truth ought to be the primary study of man.

I prefer the wisdom of the uneducated to the folly of the loquacious.

But if you should take the bond of goodwill out of the universe no house or city could stand, nor would even the tillage of the fields abide. If that statement is not clear, then you may understand how great is the power of friendship and of concord from a consideration of the results of enmity and disagreement. For what house is so strong, or what state so enduring that it cannot be utterly overthrown by animosities and division?

No man should so act as to make a gain out of the ignorance of another.

Nihil est incertius vulgo, nihil obscurius voluntate hominum, nihil fallacius ratione tota comitiorum. (Nothing is more unpredictable than the mob, nothing more obscure than public opinion, nothing more deceptive than the whole political system.)