Jesus is about to become a very important person to those who will listen to him. John is predicting that the Messiah will baptize with the Holy Spirit and with fire. When Jesus is baptized, the Holy Spirit descends on him in the form of a dove. We receive that same Holy Spirit when we are baptized. It is the same Holy Spirit that will stay with us until the end of time to guide us and help us.
Water is another important sign in baptism.
God speaks these words at every baptism because we are all God's dear sons and daughters. God is very pleased with all of us, just as God was pleased with Jesus. At our baptisms we become just like Jesus, with the Holy Spirit to guide us as we guide others toward knowing more about the God who loves us all. As a sign of your baptismal promise, we will renew our commitments to our baptism today by making promises like the ones that our parents made for us when we were baptized. This is our faith that we live by through our baptisms.