"He that communicates his secret to another makes himself that other's slave"

"There can be no tyrants where there are no slaves"

"The whole commerce between master and slave is a perpetual exercise of the most boisterous passions, the most unremitting despotism on the one part, and degrading submissions on the other. Our children see this, and learn to imitate it"

"Those who will not reason, are bigots, those who cannot, are fools, and those who dare not, are slaves"

"The danger of the past was that men became slaves. The danger of the future is that man may become robots"

"A man is no less a slave because he is allowed to choose a new master once in a term of years"

"Do not quench your inspiration and your imagination; do not become the slave of your model"

"I freed a thousand slaves I could have freed a thousand more if only they knew they were slaves"

"Friendship is a disinterested commerce between equals; love, an abject intercourse between tyrants and slaves"

"He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave"

"He who will not reason, is a bigot; he who cannot is a fool; and he who dares not is a slave"