Slavery is a great evil and sin, which affects not only individuals, but our country; and, both as Christians and patriots, we ought to be sensibly alive to every thing that affects our common weal. You who live at the South, it may be, have more responsibility in this matter than we at the North; but none of us can say, "because I am not personally implicated in inflicting wrongs upon the slave, therefore I have nothing to do for their removal." Should this become the universal sentiment of the church, Satan's kingdom in our world would never come to an end, and wickedness would prevail forever. The spirit of Christianity, although preëminently mild, gentle, patient, and long-suffering, is nevertheless, in an important sense, aggressive. It has ever claimed the right of interesting itself in the welfare of every human creature—to exert its influence to check the progress of sin in every form—to attack error in principle and in practice—to "loose the bands of wickedness,"—"undo heavy burdens,"—"break every yoke,"—"deliver the poor and needy,"—and to "remember them that are in bonds as bound with them." This, by some, may be called officiousness, but we cannot help it; it is a part of the Christian's legitimate business to volunteer his influence and his services (in every proper way) in opposing wrong, and to stand up and plead the cause of those who suffer it the world over. He cannot refrain from doing so, without proving himself false to his Master and his Master's cause.

Admitting, then, that all Christians have some kind of responsibility and duty devolving on them, a most important question comes up. Thirdly, what shall they do? There are certainly some things which it is perfectly evident we should not do,—though we should rebuke this and every sin, we should not give vent to our hatred of the system in ebullitions of wrath, invective, and abuse toward slaveholders. Thus did not Christ nor his apostles. This is not in accordance with the Christian spirit, and could be productive only of evil.

Neither should we endeavor to exert an influence over the slaves to make them restive and disobedient; none but an enemy to the true interests, both of the slave and his country, would do that, unless under some hallucination.

Neither should we interfere politically with slavery beyond the boundaries of our own State, in States where it now exists by the laws of the land. I might go on indefinitely, and specify what we should not do; but this does not meet the case;—what shall we do? It would be arrogance in me to attempt a full answer to a question that has engaged the attention of many abler heads and better hearts than mine, but there are some things which have already been said by others, that cannot be too frequently repeated.

In the first place, we can commit this whole matter to God in humble, earnest prayer. Here is something which we can all do, North and South, and in which we shall all be agreed. However much we may differ in regard to the safety and expediency of other measures to moderate the condition of the slave and bring about his ultimate emancipation, we are of one mind in regard to the safety and efficacy of prayer. One effect of this will be to unite our own hearts more closely in sympathy and love. There will be no danger of calling each other hard names, bandying unchristian epithets, and biting and devouring one another, if we are in the habit of meeting daily at the throne of grace to pray for a cause in which we take a mutual interest.

By prayer we may hope to be enlightened more fully in regard to our duty. "If any man lack wisdom," and surely we all do on this subject, "let him ask of God."

In answer to prayer, we have reason to hope that God will open the eyes to teach the hearts of all slaveholders, and lead them to "do justly and love mercy," and also that he will, in his holy and wise Providence, redress the wrongs of his oppressed children, and prepare the way for their ultimate emancipation.

Prayer is the Christian's first and last resort. Let us, then, my dear brother, pray over this subject continuously, and with an earnestness commensurate with its importance, and then, I doubt not, we shall ourselves be more enlightened than we now are as to our future course.

A second duty, hardly less obvious than prayer, is to use all the influence we possess to prevent the extension of the domain of slavery. To this end, we should utter our voices long and loud in remonstrance against any such measure. If we and our legislators may not politically interfere with slavery in States where it now exists, we may interfere to prevent it from exerting its baleful influence over territory now free. We should do many things for the sake of peace and conciliation. We have heretofore made concessions and compromises—perhaps too many—on this subject; but here is where the people of God, North and South, should make a stand, and declare before heaven and earth, and with an emphasis which cannot be misunderstood, that not another inch of our public domain shall be cursed with slavery for any consideration whatever, if our influence can prevent it. In our remonstrances, we will be respectful, but firm. Let our politicians know that all persons who are governed by Christian principle, through the length and breadth of the land, have taken their position, and that the mountains shall be removed out of their places, ere they will swerve from it, and there will be but little danger of slave extension.

In the third place, we should use every endeavor to disseminate the gospel of Christ, and bring its principles to bear upon all classes of persons, North and South. If we can do this effectually, it is all sufficient. The Gospel, if faithfully applied, is a sure remedy for every social and moral evil that ever existed. We at the North should demonstrate to our slave-holding friends whom we wish to influence, that we ourselves are governed by its spirit, and actuated by its principle, in all that we do in relation to this subject. It is not ambition, a lust for power, sectional jealousy, a spirit of censoriousness or ill-will, that prompts us to what they have been in the habit of regarding as intermeddling with their affairs, in which we have no concern, but a spirit of love,—love not less to them than to their slaves. And then, in the temper of Christ, we will bring the Gospel to bear on the slaveholder's conscience and sense of justice. We will hold up and keep before his mind the great rule of life given by Him who spake as never man spake,—"Whatsoever ye would that men should do to you, do you even so to them." Let this rule be once adopted and carried out, and it is enough. Human beings would no more be sold as beasts in the market, and driven to unrequited toil; the minds of men would no longer be kept in ignorance; the domestic circle would never again be invaded by the hand of sordid avarice separating husbands and wives, parents and children, doing savage violence to the noblest affections of our nature; the Bible would be put into the hands of every slave, and he would be taught to read it; common schools and Sabbath schools would be everywhere established and maintained, as well for the slave as for the white child; the master would regard those whom he now holds as property as his own brethren, going with him to the same judgment, and destined finally to dwell with him as his equals, in the same heaven, and to wear as bright crowns and sing as rapturous a song as he. He would immediately set himself about preparing his slaves for emancipation, and for the enjoyment of those natural rights, of which they have for so long a time been most unjustly deprived. In short, slavery, as the term is now understood, would cease instantly, and a kind, parental guardianship would take its place, and every southern plantation would be transformed into a moral garden of beauty and happiness, and universal and entire emancipation would follow with the least possible delay. And, finally, we should if possible bring the Gospel to bear upon the great body politic, upon our presidents, our governors, our National and State legislators. It would seem that some of our lawmakers are much better acquainted with Blackstone and Vattel, than they are with the Lord Jesus Christ, or they would not disgrace our statute-books with laws which ignore the "higher laws" of God. We should often remind them that this is a Christian, and not a heathen or infidel republic; and that every enactment, not consistent with the gospel of Christ and inalienable human rights, does violence to the Christian sentiment and Christian conscience of the nation, and must be repealed. If they will not hear us, we have only to appoint more faithful servants, who will do as they are told. We have no idea of "uniting church and state," but to infuse as much of the Gospel into the state as possible is both a privilege and duty; and when all our affairs and institutions, public, domestic, and private, are administered on gospel principles, we shall become a free, prosperous, and happy people, and not till then.