Quest. VI. But is not my error my sin, if I prove mistaken, and take that man for a sincere christian who is none?
Answ. If you judged it to be certain, your judgment and error was your sin; but if you only judged him a professor of christianity, and one that on that account you were bound to have church communion with as if he were sincere, because you cannot prove the contrary, this was no error; or if you erred for want of sufficient evidence to know the truth, this error is not in itself a sin.
Quest. VII. Whom must I judge a visible member of the church, with whom I am thus bound to hold communion?
Answ. 1. If you are the pastor of the church who are made the judge, at his admission by baptism, or afterwards, you must so judge of every one who maketh a credible profession of true christianity, that is, of his present consent to the sacramental covenant: and that profession is credible, which is, 1. Understood by him that maketh it. 2. Deliberate. 3. Voluntary. 4. Seemingly serious. 5. And is not disproved by valid evidence of the contrary. These are the true measures of church communion; for every man, next God, is the judge of his own heart; and God would have every man the chooser or refuser of his own mercies.
2. But if you are but a private member of the church, you are to judge that person a visible member of the church, whom the pastor hath taken in by baptism, and not cast out again by excommunication; except the contrary be notorious: and even then you are oft obliged for order sake to carry yourself towards him as a visible member, till he be regularly cast out.
Quest. VIII. Whom must I judge a true worshipper of God, and whom not?
Answ. Him that professeth true christianity, and joineth in true worship with a christian church, or privately (when hindered) acknowledgeth the true God in all his essential attributes, and heareth his word, and prayeth to him for all things necessary to salvation, and praiseth him accordingly, not giving the worship proper to God unto any creature; and doth all this as a sinner redeemed by Jesus Christ, trusting in his merits, sacrifice, and intercession, and giveth not his office to any other. And he is a false worshipper who denieth any essential attribute of God, or essential part of the office of Christ, or giveth these to any other; or refuseth his word, or excludeth in his prayers any thing essential to christianity, or absolutely necessary to salvation. But secundum quid, in lesser parts, or in circumstances, or measures, every man on earth is a false worshipper, that is, he offereth God a worship some way faulty and imperfect, and hath some sin in his worshipping of God; and sin is a thing that God requireth not, but forbiddeth even in the smallest measures.
Quest. IX. Which must I judge a true church of Christ, and which a false church?
Answ. The universal church is but one, and is the whole society of christians as united to Christ their only Head; and this cannot be a false church. But if any other set up a usurper as the universal head, and so make another policy and church, this is a false church formally, or in its policy; but yet the members of this false church or policy may some of them as christians be also members of the true church of Christ: and thus the Roman church as papal is a false catholic church, having the policy of a usurper; but as christians they may be members of the true catholic church of Christ. But for a particular church which is but part of the universal, that is a true church considered merely as an ungoverned community, which is a true part of the catholic, prepared for a pastor, but yet being without one: but that only is a true political church, which consisteth of professed christians conjoined under a true pastor, for communion in the profession of true christianity, and for the true worshipping of God, and orderly walking for their mutual assistance and salvation.
Quest. X. Whom must we judge true prophets and pastors of the church.