“When the master has come to do everything through the slave, the slave becomes his master, since he cannot live without him.”

Source: Wild Seed (1980), Chapter 1 (p. 11)

Source: The Social Contract

Book III, line 152 (tr. E. Ridley).
Pharsalia

Source: Cannibals All!, or Slaves Without Masters (1857), pp. 125-126

Existentialism Versus Marxism (1966), p. 20

The Groundings with my Brothers https://archive.org/details/TheGroundingsWithMyBrothers (1969)
Context: We were told that violence in itself is evil, and that, whatever the cause, it is unjustified morally. By what standard of morality can the violence used by a slave to break his chains be considered the same as the violence of a slave master? By what standards can we equate the violence of blacks who have been oppressed, suppressed, depressed and repressed for four centuries with the violence of white fascists. Violence aimed at the recovery of human dignity and at equality cannot be judged by the same yardstick as violence aimed at maintenance of discrimination and oppression.

As quoted in Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong https://books.google.com/books?id=5m2_xeJ4VdwC&printsec=frontcover&dq=lies+my+teacher+told+me&hl=en&sa=X&ei=dV39VNWyPMmWgwTN14JQ&ved=0CCwQ6AEwAA#v=snippet&q=maltreated&f=false (2008), p. 193
2000s, 2007, Lies My Teacher Told Me: Everything Your American History Textbook Got Wrong (2007)
Context: Ideas made the opposite impact in the Confederacy. Ideological contradictions afflicted the slave system even before the war began. John Brown knew the masters secretly feared their slaves might revolt, even as they assured abolitionists that slaves really liked slavery. One reason his Harpers Ferry raid prompted such an outcry in the South was that slave owners feared their slaves might join him. Yet their condemnations of Brown and the 'Black Republicans' who financed him did not persuade Northern moderates but only pushed them toward the abolitionist camp. After all, if Brown was truly dangerous, as slave owners claimed, then slavery was truly unjust. Happy slaves would never revolt... White Southerners founded the Confederacy on the ideology of white supremacy. Confederate soldiers on their way to Antietam and Gettysburg, their two main forays into Union states, put this ideology into practice: they seized scores of free black people in Maryland and Pennsylvania and sold them south into slavery. Confederates maltreated black Union troops when they captured them.

IV, 3
Variant translation: The good man, though a slave, is free; the wicked, though he reigns, is a slave, and not the slave of a single man, but — what is worse — the slave of as many masters as he has vices.
The City of God (early 400s)
Context: The dominion of bad men is hurtful chiefly to themselves who rule, for they destroy their own souls by greater license in wickedness; while those who are put under them in service are not hurt except by their own iniquity. For to the just all the evils imposed on them by unjust rulers are not the punishment of crime, but the test of virtue. Therefore the good man, although he is a slave, is free; but the bad man, even if he reigns, is a slave, and that not of one man, but, what is far more grievous, of as many masters as he has vices; of which vices when the divine Scripture treats, it says, “For of whom any man is overcome, to the same he is also the bond-slave.”