There is not a man beneath the canopy of heaven who does not know that slavery is wrong for him. -- Building on his previous logical appeals, Douglass puts each person in the position of deciding whether slavery would be a legitimate condition for him. If the answer is "no", then that same answer must apply to the slaves. His conclusion follows syllogistic rigidity:
With these arguments settled, Douglass can turn his attention to the final question presented by his argument.