Slave and free and simply names. What is a slave? It is a mere name. How many masters lie drunken on their beds, while slaves stand by sober? Whom shall I call a slave? The one who is sober, or the one who is drunk? The one who is the slave of a man, or the one who is the captive of passion? The former has his slavery on the outside; the latter wears his captivity on the inside. I say this, and I will not stop saying it, in order that you may have a disposition which serves the true nature of things, and may not be led astray by the same deception as most people, but may know what a slave is, what a poor person is, what an ignoble person is, what a fortunate person is, and what passion is. If you learn to distinguish these, you will not be subject to any confusion. — Sermon 6.