It has been shown in previous lectures that the principle of slavery accords fully with the doctrine of abstract rights, civil and social; and that a system of domestic slavery in the United States is demanded by the circumstances of the African population in the country. But it by no means follows that the conduct of all masters, in the exercise of their functions as masters, is proper, any more than that the conduct of all parents, or the owners of apprentices, is such as it should be. The opinion is entertained that the domestic government of children does not more than approximate propriety as a general thing; and that the government of apprentices and of African slaves falls far short of what is proper. In this lecture it is proposed to deal with the relations of masters to slaves, that is, the duties they owe them. The doctrine that the system of domestic slavery assumes that the slave is a “mere machine--a chattel,” has been fully exploded. The Bible particularly regards the slave an accountable being. It requires him to yield a willing obedience to his master, and teaches him that such service is accepted of the Lord as service done unto himself, Ephesians vi. 5-8; and in the 9th verse, the master is required to “do the same things unto them, forbearing threatening: knowing that your Master also is in heaven.” And again, (Colossians iv. 1,) “Masters, give unto your servants that which is just and equal.” Hence, in the strictest sense, religion holds the scales of justice between masters and slaves. Each one is held to a strict accountability for the faithful performance of his duty, the one to the other--“for there is no respect of persons with God.” It behooves us, then, who are masters, or who expect to become masters, to inquire into the duties of this relation. The master who does not inform himself on this subject, and endeavor conscientiously to do his duty, is strangely wanting in important elements of Christian character, and, indeed, even in some of those attributes which enter materially into the character of a good citizen.