If wisdom were offered me with this restriction, that I should keep it close and not communicate it, I would refuse the gift

errare humanum est, sed perseverare diabolicum: 'to err is human, but to persist (in the mistake) is diabolical.

No man ever became wise by chance

Reflect that nothing merits admiration except the
spirit, the impressiveness of which prevents it from being impressed by anything.

We are more often frightened than hurt; and we suffer more from imagination than from reality.

Wisdom allows nothing to be good that will not be so forever; no man to be happy but he that needs no other happiness than what he has within himself; no man to be great or powerful that is not master of himself.