Now, although this fruitful faith is the only certain fundamental mark by which the children of God and members of Jesus Christ shall be known, and through which alone they are also, by grace, made partakers of the (by us unmerited) benefits of Christ, God has notwithstanding been pleased to set forth and confirm to believers, by external, visible signs, the benefits and merits of his Son Jesus Christ, which, as has been said, are received only by faith, and retained by obedience, in order that the things signified (of the promises of the grace of God), might shine forth the more clearly by the external signs, partly to assure the consciences of the believers, in the new covenant of the grace of God, and partly to bind the members of Jesus Christ together in unity, as members belonging to one body. For this purpose he has instituted in the church of the New Testament especially two such ordinances or signs suited to the things signified, in which all true believers find great benefit and comfort. These are the _Holy Baptism_, and the _Holy Supper_. Eph. 2:7; John 1:16; Mark 16:16; Luke 22:19; Acts 2:38; 1 Cor. 11:24; Jer. 31:31; 1 Pet. 3:21; 1 Cor. 12:13; 10:17; Rom. 6:5; Matt. 28:19,26.
Holy baptism is an external, visible ordinance, the rite of which consists in this: that all those who hear believe, and receive gladly with a penitent heart, the doctrine of the holy Gospel, are baptized, for a holy purpose, with water, in the name of the Father, and of the Son, and of the Holy Ghost, according to the institution of Christ, and the usage of his apostles. Acts 2:41; Matt. 3:11; Acts 1:35–38; 10:48.
The benefit which the Lord God, on his part, declares through the sign of baptism, is: The washing away of the sinful corruptions of the soul, through the shedding of the blood of Christ; which signifies the forgiveness of sins, obtained through this blood, to the assurance of a good conscience with God, by which believers comfort themselves with the promise of eternal salvation. Acts 22:16; Col. 1:14; 1 John 1:7; Heb. 1:3; Rev. 1:5.
The obligations which baptism lays upon those baptized, are: That they, burying their sins thereby into the death of Christ, bind themselves to the newness of the life of Jesus, in order to employ, as members of the body of Christ (having put on Christ), each his several gift, for the maintenance and improvement of this body in spiritual and temporal things; and further, that they as the true household of God, and citizens of the heavenly Jerusalem, must obey the civil laws of their King by observing all his commandments. Rom. 6:3,4; Col. 2:12; Gal. 3:27; 1 Cor. 12:25; Eph. 2:19; Matt. 28:20.