How do we know that Christ's baptism represents our union with Him?

The connection between Christ's baptism and the believer's union with Him is rooted in the idea that His life, death, and resurrection encompass our spiritual experience. In Romans 6:3-4, the Apostle Paul reveals that believers are baptized into Christ’s death and are raised to walk in newness of life, emphasizing the inseparable link between Jesus' actions and our spiritual state. Consequently, when Jesus was baptized, He was not only fulfilling God's requirements for righteousness but also publicly acknowledging His identification with us as sinners. This act of baptism serves as a foreshadowing of the other 'baptism' He would undergo — the baptism of fire as He bore the wrath of God for sin. Thus, Christ's baptism is a profound declaration of our union with Him in redemptive work, ensuring that as He fulfills all righteousness, we, as believers, share in that righteousness.