684. The Third Function of Baptism, and Its Ultimate Purpose, Is to Lead Us to Be Regenerated
This function is the ultimate reason why baptism exists; this is its goal. For one thing, true Christians know and acknowledge the Lord the Redeemer Jesus Christ, who, because he is the Redeemer, is also the Regenerator. (For the point that redemption and regeneration amount to the same thing, see under the third heading in the chapter on reformation and regeneration [579].)
For another thing, Christians have the Word. In it the means of being regenerated are set forth and described; those means are faith in the Lord and goodwill toward our neighbor.
This is the same as the point made about the Lord that "He baptizes with the Holy Spirit and with fire" (Matthew 3:11; Mark 1:8-11; Luke 3:16; John 1:33). The Holy Spirit here means divine truth that is related to faith; the fire means divine goodness that is related to love and goodwill. Both emanate from the Lord. (For more on the point that the Holy Spirit means divine truth that is related to faith, see the chapter on the Holy Spirit [139-140]. For more on the point that fire means divine goodness that is related to love, see Revelation Unveiled 395, 468.) It is through these two things that the Lord carries out the entire process of regenerating us.
The Lord himself was baptized by John (Matthew 3:13-17; Mark 1:9; Luke 3:21-22) not only so as to institute baptism for the future and set the example, but also because he glorified his human nature and made it divine in the same way that he regenerates us and makes us spiritual.