Any man is liable to err, only a fool persists in error.

Any man can make mistakes, but only an idiot persists in his error.

If I err in belief that the souls of men are immortal, I gladly err, nor do I wish this error which gives me pleasure to be wrested from me while I live.

I would rather err with Plato than think rightly with these (Pythagoreans)

The nobler a man, the harder it is for him to suspect inferiority in others.

We are all motivated by a keen desire for praise, and the better a man is, the more he is inspired by glory