Article 28: Every One is Bound to Join Himself to the True Church.
We believe, since this holy congregation is an assembly of those who are saved, and out of it there is no salvation, that no person, of whatsoever state or condition he may be, ought to withdraw himself to live in a separate state from it; but that all men are in duty bound to join and unite themselves with it, maintaining the unity of the church; submitting themselves to the doctrine and discipline thereof; bowing their necks under the yoke of Jesus Christ; and as mutual members of the same body, serving to the edification of the brethren, according to the talents God has given them.
And that this may be the more effectually observed, it is the duty of all believers, according to the Word of God, to separate themselves from all those who do not belong to the church, and to join themselves to this congregation wheresoever God hath established it, even though the magistrates and edicts of princes be against it, yea, though they should suffer death or any other corporal punishment. Therefore all those who separate themselves from the same, or do not join themselves to it, act contrary to the ordinance of God.