Question: What is a Sacrament? Answer: A sacrament is an holy ordinance instituted by Christ in his church, to signify, seal, and exhibit unto those that are within the covenant of grace, the benefits of his mediation; to strengthen and increase their faith, and all other graces; to oblige them to obedience; to testify and cherish their love and communion one with another; and to distinguish them from those that are without. It is required of them that would worthily partake of the Lord’s Supper, that they
examine themselves of their knowledge to discern the Lord’s body, of their faith to feed upon Him, of their repentance, love, and new obedience; lest, coming unworthily, they eat and drink judgment to themselves.
Question: May one who doubteth of his being in Christ, or of his due preparation, come to The Lord's Supper? Answer: One who doubteth of his being in Christ, or of his due preparation to the sacrament of the Lord's supper, may have true interest in Christ, though he be not yet assured thereof; and in God's account hath it, if he be duly affected with the apprehension of the want of it, and unfeignedly desires to be found in Christ, and to depart from iniquity: in which case (because promises are made, and this sacrament is appointed, for the relief even of weak and doubting Christians he is to bewail his unbelief, and labor to have his doubts resolved; and, so doing, he may and ought to come to the Lord's supper, that he may be further strengthened.
Question #173. Question: May any who profess the faith, and desire to come to the Lord's Supper, be kept from it? Answer: Such as are found to be ignorant or scandalous, notwithstanding their profession of the faith, and desire to come to the Lord's Supper, may and ought to be kept from that sacrament, by the power which Christ hath left in his church, until they receive instruction, and manifest their reformation.