"All knowledge, when separated from justice and virtue, is seen to be cunning and not wisdom."

"God is the cause only of good."

"By harming a horse, you decrease his excellence. Thus, by harming a person, you decrease their excellence."

"It is by justice, that we can authenticate a man's value or nullity, the absence of justice, is the absence of what makes him man."

"Is there any self-existent fire? and do all those things which we call self-existent exist? or are only those things which we see, or in some way perceive through the bodily organs, truly existent, and nothing whatever besides them? And is all that which we call an intelligible essence nothing at all, and only a name?"

"Some have courage in pleasures, and some in pains; some in desires, and some in fears; and some are cowards under the same conditions."

"The worst type of man behaves as badly in his waking life as some men do in their dreams."

"It is by justice, that we can authenticate a man's value or nullity, the absence of justice, is the absence of what makes him man."

"Until philosophers are kings, or the kings and princes of this world have the spirit and power of philosophy, and political greatness and wisdom meet in one, and those commoner natures who pursue either to the exclusion of the other are compelled to stand aside, cities will never have rest from their evils — no, nor the human race, as I believe — and then only will this our State have a possibility of life and behold the light of day."

"What kind of man am I? One of those who would be pleased to be refuted if I say anything untrue, and who would be pleased to refute anyone who says anything untrue; one who, however, wouldn’t be any less pleased to be refuted than to refute. For I count being refuted a greater good, insofar as it is a greater good for oneself to be delivered from the worst thing there is than to deliver someone else from it."