4. Unity and concord is the church's beauty: it maketh us amiable even to the eye of nature, and venerable and terrible even to the eye of malice. A concord in sin is no more honour, than it is for conquered men to go together in multitudes to prison or captivity; or for beasts to go by droves unto the slaughter. But to see the churches of Christ with one heart and soul acknowledging their Maker and Redeemer, and singing his praise as with one voice, and living together in love and concord, as those that have one principle, one rule, one nature, one work, one interest, and hope, and end, this is the truly beauteous symmetry, and delectable harmony. Psal. cxxxiii. "Behold how good and how pleasant it is for brethren to dwell together in unity! It is like the precious ointment upon the head, that ran down upon the beard, even Aaron's beard, that went down to the skirts of his garment. As the dew of Hermon, and as the dew that descendeth upon the mountains of Zion: for there the Lord commanded the blessing, even life for evermore." The translators well put this as the contents of this psalm, "The benefit of the communion of saints." 5. The concord of believers doth greatly conduce to the successes of the ministry, and propagation of the gospel, and the conviction of unbelievers, and the conversion and salvation of ungodly souls. When Christ prayeth for the unity of his disciples, he redoubled this argument from the effect or end, "that the world may believe that thou hast sent me;" and "that the world may know that thou hast sent me, and hast loved them," &c. John xvii. 21, 23. Would this make the world believe that Christ was sent of God? Yes, undoubtedly if all christians were reduced to a holy concord, it would do more to win the heathen world, than all other means can do without it. It is the divisions and the wickedness of professed christians, that maketh christianity so contemned by the Mahometans, and other infidels of the world; and it is the holy concord of christians that would convince and draw them home to Christ. Love, and peace, and concord are such virtues, as all the world is forced to applaud, notwithstanding nature's enmity to good. When the first christian church "were all with one accord in one place, and continued daily with one accord in the temple, and breaking bread from house to house partook of food with gladness and singleness of heart," and when "the multitude of believers were of one heart and of one soul," Acts ii. 1, 46; iv. 32, then did "God send upon them the Holy Ghost, and then were three thousand converted at a sermon," Acts ii. 41; and with "great power gave the apostles witness of the resurrection of the Lord Jesus, and great grace was upon them all," Acts iv. 33. [Sidenote: How our concord would promote the conversion of infidels.]