What does such baptizing with water indicate?
It indicates that the Old Adam in us should by daily contrition and repentance be drowned and die with all sins and evil desires, and that a new man should daily emerge and arise to live before God in righteousness and purity forever. (Small Catechism: Baptism, Part 4)
In the Name + of Jesus. Amen. The delight and pleasure of God are in His beloved Son, and that is where you are, too. What is yours is His. What is His is yours. So God delights in us, too. If our hearts would take this in, Martin Luther said, they would burst for joy into a hundred thousand pieces. In a world that is given over to sin, death, and the devil, there is one point where the delight of God dwells: in Baptism. That is where we are in solidarity with Jesus. With Jesus there is God's delight. God, Christ, you. All together like one thing.
God has put His words on you. With the water His Name was put on you at your Baptism. You are not just a doubtful, ambiguous, meaningless, hopeless bunch of molecules bouncing around. You have the Word of God put on you--at your Baptism, most certainly, and at Jesus' Baptism, too. There Jesus is in solidarity with you and you with Him. Because He is the beloved Son, you with Him are beloved sons and daughters. You are delighted in and beloved by God. So you can't just drag along the old man in Adam and his dreary, fearful, guilt-ridden, nobody-loves-me, me-standing apart, all alone way. The Righteous One fulfills all righteousness. And you are in on that where God says you are at--in His delight, with Jesus. As if that were not enough, Christ gives to you His Body and Blood. It goes with you as it goes with Him. In the Name + of Jesus. Amen.
Sin, disturb my soul no longer: I am baptized into Christ! I have comfort even stronger: Jesus' cleansing sacrifice. Should a guilty conscience seize me Since my Baptism did release me In a dear forgiving flood, Sprinkling me with Jesus' blood? (God's Own Child, I Gladly Say It, LSB 594:2)