Hitherto I had thought only slavery dreadful; but the state of a free negro appeared to me now equally so at least, and in some respects even worse, … - Olaudah Equiano

Such a tendency has the slave-trade to debauch men's minds, and harden them to every feeling of humanity! For I will not suppose that the dealers in slaves are born worse than other men—No; it is the fatality of this mistaken avarice, that it corrupts the milk of human kindness and turns it into gall. And, had the pursuits of those men been different, they might have been as generous, as tender-hearted and just, as they are unfeeling, rapacious and cruel. Surely this traffic cannot be good, which spreads like a pestilence, and taints what it touches! which violates that first natural right of mankind, equality and independency, and gives one man a dominion over his fellows which God could never intend! For it raises the owner to a state as far above man as it depresses the slave below it; and, with all the presumption of human pride, sets a distinction between them, immeasurable in extent, and endless in duration! Yet how mistaken is the avarice even of the planters? Are slaves more useful by being thus humbled to the condition of brutes, than they would be if suffered to enjoy the privileges of men? The freedom which diffuses health and prosperity throughout Britain answers you—No. When you make men slaves you deprive them of half their virtue, you set them in your own conduct an example of fraud, rapine, and cruelty, and compel them to live with you in a state of war; and yet you complain that they are not honest or faithful! You stupify them with stripes, and think it necessary to keep them in a state of ignorance; and yet you assert that they are incapable of learning; that their minds are such a barren soil or moor, that culture would be lost on them; and that they come from a climate, where nature, though prodigal of her bounties in a degree unknown to yourselves, has left man alone scant and unfinished, and incapable of enjoying the treasures she has poured out for him!—An assertion at once impious and absurd. Why do you use those instruments of torture? Are they fit to be applied by one rational being to another? And are ye not struck with shame and mortification, to see the partakers of your nature reduced so low? But, above all, are there no dangers attending this mode of treatment? Are you not hourly in dread of an insurrection? [...] But by changing your conduct, and treating your slaves as men, every cause of fear would be banished. They would be faithful, honest, intelligent and vigorous; and peace, prosperity, and happiness, would attend you.

When [Capt. Pascal] saw me he appeared a good deal surprised, and asked me how I came back? I answered, 'In a ship.' To which he replied dryly, 'I suppose you did not walk back to London on the water.' As I saw, by his manner, that he did not seem to be sorry for his behaviour to me, and that I had not much reason to expect any favour from him, I told him that he had used me very ill, after I had been such a faithful servant to him for so many years; on which, without saying any more, he turned about and went away.

This produced copious perspirations, so that the air soon became unfit for respiration, from a variety of loathsome smells, and brought on a sickness among the slaves, of which many died, thus falling victims to the improvident avarice, as I may call it, of their purchasers. This wretched situation was again aggravated by the galling of the chains, now become insupportable; and the filth of the necessary tubs, into which the children often fell, and were almost suffocated. The shrieks of the women, and the groans of the dying, rendered the whole a scene of horror almost inconceivable.