"When you have done a good deed and another has received it, why do you still ask for a third thing, as fools do, namely, that you may be thought to have done a good deed or that you may be rewarded?"

"How many have been afraid of death and yet have died laughing?"

"If a man is able to show me that I do not think or act right, I will gladly change; for I seek the truth, by which no man was ever injured. But he is injured who abides in his error and ignorance."

"What then is that which is able to conduct a man? One thing and only one, philosophy. But this consists in keeping the demon within a man free from violence and unharmed, superior to pains and pleasur…"

"Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth."