"Knowledge is the food of the soul."

"Everything that deceives may be said to enchant."

"Eat and drink and sit with the mighty, and make yourself agreeable to them; for from the good you will learn what is good, but if you mix with the bad you will lose the intelligence which you already have."

"It's not at all uncommon to find a person's desires compelling him to go against his reason, and to see him cursing himself and venting his passion on the source of the compulsion within him. It's as if there were two warring factions, with passion fighting on the side of reason."

"He who commits injustice is ever made more wretched than he who suffers it."

"Good actions can strengthen ourselves and inspire good actions to others."

"Books are immortal sons defying their sires."

"We are like people looking for something they have in their hands all the time; we're looking in all directions except at the thing we want, which is probably why we haven't found it."

"The whole life of the philosopher is a preparation for death."

"A freeman ought not to be a slave in the acquisition of knowledge of any kind. Bodily exercise, when compulsory, does no harm to the body; but knowledge which is acquired under compulsion obtains no hold on the mind."