It allows you to identify with Christ’s death and resurrection.
Baptism is a symbol of Christ’s death, burial, and resurrection. Our entrance into the water during baptism identifies us with Christ’s death on the cross, His burial in the tomb, and His resurrection from the dead.
For you were buried with Christ when you were baptized. And with Him you were raised to new life because you trusted the mighty power of God, who raised Christ from the dead. You were dead because of your sins and because your sinful nature was not yet cut away. Then God made you alive with Christ, for He forgave all our sins. He canceled the record of the charges against us and took it away by nailing it to the cross.
Colossians 2:12-14
It’s a celebration of your new life.
Baptism is also a symbol of your new life in Christ. When we come out of the water during baptism, it symbolizes that we have buried the old life of sin and have been raised to a new life in Christ. Here is one simple way to explain baptism: A wedding ring is a symbol of the covenant between a husband and a wife. In the same way, baptism is a symbol of our commitment to Christ. Wearing a wedding ring doesn’t make you married and removing it doesn’t end your marriage—it is simply the symbol of the commitment you made to each other. And much like a wedding is a formal ceremony where the bride and groom—in front of family and friends—profess their love and commitment to each other publicly, baptism is the public declaration of your faith and your relationship with Jesus.
This means that anyone who belongs to Christ has become a new person. The old life is gone; a new life has begun! 2 Corinthians 5:17 For we died and were buried with Christ by baptism. And just as Christ was raised from the dead by the glorious power of the Father, now we also may live new lives. Romans 6:4
It opens a door to a blessed life.
God honors obedience. Baptism confirms our identity in Christ and invites God’s blessings on us, as His children.
"He replied, 'Blessed rather are those who hear the word of God and obey it.'” Luke 11:28 Whoever has my commands and keeps them is the one who loves me. The one who loves me will be loved by my Father, and I too will love them and show myself to them.'” John 14:21
If you fully obey the Lord your God and carefully follow all His commands I give you today, the Lord your God will set you high above all the nations on earth. All these blessings will come on you and accompany you if you obey the Lord your God. Deuteronomy 28:1-2