"The Prophet said, "He who has a slave-girl and teaches her good manners and improves her education and then manumits and marries her, will get a double reward; and any slave who observes Allah's right and his master's right will get a double reward.""

"In his discussion on slavery Aristotle said that when the shuttle wove by itself and the plectrum played by itself chief workmen would not need helpers nor masters slaves. At the time he wrote, he believed that he was establishing the eternal validity of slavery; but for us today he was in reality justifying the existence of the machine. Work, it is true, is the constant form of man's interaction with his environment, if by work one means the sum total of exertions necessary to maintain life; and the lack of work usually means an impairment of function and a breakdown in organic relationship that leads to substitute forms of work, such as invalidism and neurosis. But work in the form of unwilling drudgery or of that sedentary routine which... the Athenians so properly despised—work in these forms is the true province of machines. Instead of reducing human beings to work-mechanisms, we can now transfer the main part of burden to automatic machines. This potentially... is perhaps the largest justification of the mechanical developments of the last thousand years."

"We used to own our slaves; now we just rent them."

"If the trade is at present carried on to the same extent and nearly in the same manner, while we are delaying from year to year to put a stop to our part in it, the blood of many thousands of our helpless, much injured fellow creatures is crying against us. The pitiable state of the survivors who are torn from their relatives, connections, and their native land must be taken into account. I fear the African trade is a national sin, for the enormities which accompany it are now generally known; and though, perhaps, the greater part of the nation would be pleased if it were suppressed, yet, as it does not immediately affect their own interest, they are passive. {...] Can we wonder that the calamities of the present war begin to be felt at home, when we ourselves wilfully and deliberately inflict much greater calamities upon the native Africans, who never offended us?. "Woe unto thee that spoilest, and thou wast not spoiled when thou shalt cease to spoil, thou shalt be spoiled."