Baptism is an ordinance of the New Testament, ordained by Jesus Christ, which signifies our union with Him in His death and resurrection, the remission of our sins, and our commitment to walk in newness of life. While Reformed and Presbyterian traditions view baptism as a sign and seal of the covenant of grace often applied to both believers and their children, the Particular Baptist tradition emphasizes it as an ordinance for those who have personally professed faith in Christ.
Baptism serves as a profound outward sign of an inward reality. According to the 1689 LBCF Ch.29 §1, it signifies our fellowship with Christ in His death and resurrection and our engrafting into Him. This is rooted in the biblical testimony that our baptism is a participation in the work of Christ. As the Apostle Paul writes: "Or are ye ignorant that all we who were baptized into Christ Jesus were baptized into his death? We were buried therefore with him through baptism unto death: that like as Christ was raised from the dead through the glory of the Father, so we also might walk in newness of life" (Romans 6:3-4).
Baptism also signifies the washing away of sins, pointing us back to the blood of Christ, which alone cleanses the conscience. The Heidelberg Catechism Q.69 reminds us that this external washing serves as a divine pledge that we are as surely washed from our sins by the blood and Spirit of Christ as we are washed with water. This is clearly linked to the promise of the Gospel, as seen when the Apostle Peter exhorted: "And Peter said unto them, Repent ye, and be baptized every one of you in the name of Jesus Christ unto the remission of your sins; and ye shall receive the gift of the Holy Spirit" (Acts 2:38). This does not suggest that the water itself possesses the power to save, but that it is the appointed means to confirm our faith in the finished work of our Savior, who has already secured our redemption.