I am smart because I know I nothing.

Some suggestions for you :

The first and best victory is to conquer self.

Virtue is relative to the actions and ages of each of us in all that we do.

Good actions give strength to ourselves and inspire good actions in others.

The heaviest penalty for declining to rule is to be ruled by someone inferior to yourself.

Beauty of style and harmony and grace and good rhythm depend on simplicity – I mean the true simplicity of a rightly and nobly ordered mind and character, not that other simplicity which is only a euphemism for folly.

Man - a being in search of meaning.

Strange times are these in which we live when old and young are taught falsehoods in school. And the person that dares to tell the truth is called at once a lunatic and fool.

All men are by nature equal, made all of the same earth by one Workman; and however we deceive ourselves, as dear unto God is the poor peasant as the mighty prince.

We must go where the argument carries us, as a vessel runs before the wind.

Lack of activity destroys the good condition of every human being.

Astronomy compels the soul to look upwards and leads us from this world to another.

There are three classes of men; lovers of wisdom, lovers of honor, and lovers of gain.

A life without investigation is not worth living.

But what if there are no gods?