5. This unity and peace mainly consists in unity of love and affection: this is the great and indispensable duty of all Christians; by this they are declared Christ’s disciples; And hence it is that love is called “the great commandment,” “the old commandment,” and “the new commandment;” that which was commanded in the beginning, and will remain to the end, yea, and after the end. 1 Cor. xiii. 8, “Charity never faileth; but whether there be tongues, they shall cease; or whether there be knowledge, it shall vanish away.” And ver. 13, “And now abideth faith, hope, charity; but the greatest of these is charity.” And Col. iii. 14, “Above all these things, put on charity, which is the bond of perfectness;” because charity is the end of the commandment, 1 Tim. i. 5. Charity is therefore called “the royal law;” as though it had a superintendency over other laws, and doubtless is a law to which other laws must give place, when they come in competition with it; “above all things, therefore, have fervent charity among yourselves; for charity shall cover the multitude of sins;” 1 Pet. iv. 8. Let us therefore live in unity and peace, and the God of love and peace will be with us. That you may so do, let me remind you (in the words of a learned man), that the unity of the church is a unity of love and affection, and not a bare uniformity of practice and opinion. III. Having shewn you wherein this unity consists, I now come to the third general thing propounded: and that is, to shew you the fruits and benefits of unity and peace, together with the mischiefs and inconveniences that attend those churches where unity and peace are wanting. 1. Unity and peace is a duty well-pleasing to God, who is styled the author of peace and not of confusion. In all the churches God’s Spirit rejoiceth in the unity of our spirits; but on the other hand, where strife and divisions are, there the Spirit of God is grieved. Hence it is that the apostle no sooner calls upon the Ephesians not to grieve the Spirit of God, but he presently subjoins us a remedy against that evil, that they put away bitterness and evil-speaking, and be kind one to another, and tender-hearted, forgiving one another, even as God for Christ’s sake hath forgiven them; Eph. iv. 30, 32. 2. As unity and peace is pleasing to God, and rejoiceth his Spirit, so it rejoiceth the hearts and spirits of God’s people. Unity and peace brings heaven down upon earth among us: hence it is that the apostle tells us, Rom. iv. 17, that “the kingdom of God is not meat and drink, but righteousness and peace and joy in the Holy Ghost.” Where unity and peace is, there is heaven upon earth; by this we taste the first fruits of that blessed estate we shall one day live in the fruition of; when we shall come “to the general assembly and church of the first-born, whose names are written in heaven, and to God the judge of all, and to the spirits of just men made perfect;” Heb. xii. 23.