Read the passage and answer the question.
it is likewise most lamentable to think, how in taking negros out of africa, and selling of them here, that which god has joined together men do boldly rend asunder [matt. 19: 6]; men from their country, husbands from their wives, parents from their children. how horrible is the uncleanness, mortality, if not murder, that the ships are guilty of that bring great crouds of these miserable men, and women. methinks, when we are bemoaning the barbarous usage of our friends and kinsfolk in africa: it might not be unseasonable to enquire whether we are not culpable in forcing the africans to become slaves amongst our selves. and it may be a question whether all the benefit received by negro slaves, will balance the . . cash laid out upon them; and for the redemption of our own enslaved friends out of africa. besides all the persons and estates that have perished there.
how does sewall appeal to christians in this excerpt?