The peace and concord of believers is a thing that almost all those plead for, who call themselves believers; and yet a thing that almost all men hinder and resist while they commend it.[136] The discord and divisions of believers, are as commonly spoken against, and by the same men, as commonly fomented. The few that are sincere (both rulers and private men) desire concord and hate divisions in love to holiness which is promoted by it, and in love to the church, and good of souls, and the honour of religion and the glory of God; and the few of those that are experienced, wise, judicious persons, do choose the means that is fittest to attain these ends, and do prudently and constantly prosecute them accordingly; but these being in the world as a spoonful of fresh water cast into the sea, or a spoonful of water cast into the flames of a house on fire, no wonder if the brinish sea be not sweetened by them, nor the consuming, raging fire quenched by them. The other rulers of the world and of the churches, are for concord and against division, because this tendeth to the quieting of the people under them, and the making of men submissive and obedient to their wills, and so to confirm their dignities, dominions, and interests.[137] And all men that are not holy, being predominantly selfish, they would all be themselves the centre of that union, and bond of that concord which they desire: and they would have it accomplished upon such terms and by such means as are most agreeable to their principles and ends; in which there are almost as many minds as men: so that among all the commenders of unity and concord, there are none that take the way to attain it, but those that would centre it all in God, and seek it upon his terms, and in his way. The rest are all tearing unity and peace in pieces, while they commend it, and they fight against it while they seek it; every man seeking it for himself, and upon his own terms, and in his own way; which are so various and inconsistent, that east and west may sooner meet than they.
Yet must the sons of God be still the sons of peace, and continue their prayers and endeavours for unity, how small soever be the hopes of their success: "If it be possible, as much as in us lieth, we must live peaceably with all men," Rom. xii. 18. So far must they be from being guilty of any schisms or unlawful divisions of the church, that they must make it a great part of their care and work to preserve the unity and peace of christians. In this therefore I shall next direct them.
_Direct._ I. Understand first wherein the unity of christians and churches doth consist: or else you will neither know how to preserve it, nor when you violate it.[138] Christians are said to be united to Christ, when they are entered into covenant with him, and are become his disciples, his subjects, and the members of his (political) body. They are united to one another when they are united to Christ their common Head, and when they have that spirit, that faith, that love, which is communicated to every living member of the body. This union is not the making of many to be one christian, but of many christians to be one church; which is considerable either as to its internal life, or its external order and profession. In the former respect the bonds of our union are, 1. The heart covenant (or faith). 2. And the Spirit: the consent of Christ and of ourselves concurring, doth make the match or marriage between us; and the Spirit communicated from him to us is as the nerves or ligaments of the body, or rather as the spirits which pass through all. The union of the church considered visibly in its outward policy, is either that of the whole church, or of the particular churches within themselves, or of divers particular churches accidentally united. 1. The union of the whole is essential, integral, or accidental. The essential union is that relation of a head and members, which is between Christ and all the visible members of his church: the foundation of it is the mutual covenant between Christ and them, considered on their part as made externally, whether sincerely or not: this is usually done in baptism, and is the chiefest act of their profession of the faith. Thus the baptismal covenant doth constitute us members of the visible church. The integral and accidental union I pass by now. 2. Besides this union of the universal church with Christ the universal Head, there is in all particular organized churches, a subordinate union, (1.) Between the pastor and the flock. (2.) Between the people one towards another;[139] which consisteth in these their special relations to each other. 3. And there is an accidental union of many particular churches: as when they are united under one civil government; or consociated by their pastors in one synod or council. These are the several sorts of church union.