The first place to start is to get a rubust understanding of baptism.
At creation we find three key ingredients; water, the Spirit of God and the word of God. At our new creation we find these same three ingredients, the water of baptism, the Spirit of God hovering over the waters and the creative word of God. In the sacrament of baptism the Word of God is united with Water by the Spirit and so just as at Creation, when Yahweh spoke, the heavens and earth were brought forth into being, so likewise at the New Creation, when Yawehs creative word sounds forth at baptism, faith is bought into being (created) in the young infant.
At creation Yahweh brought forth order out of chaos, so likewise we, through union with the death and resurrection of Christ, leave the old creation to become a part of the new creation, a member of Christ the new Israel, a part of true humanity. Our lives, once chaotic by sin are renewed by Yahwehs creative word at baptism to become ordered and Spirit led, the torah written upon our hearts.
In our baptism Yahweh declares to you, You are my beloved Son; with you I am well pleased and to the World he declares, This is my beloved Son, with whom I am well pleased. This is then a statement of our identity. Just as Jesus was declared to be the Son of God in power according to the Spirit of holiness by his resurrection from the dead (Romans 1:4) so when we are baptized into his resurrection we say with Jesus, I will tell of the decree: The LORD said to me, You are my Son; today I have begotten you (Psalm 2:7). Through our baptism the Spirit himself bears witness with our spirit that we are children of God, and if children, then heirsheirs of God and fellow heirs with Christ (Romans 8:16, 17), we are assured that Yahweh is our Father and so address him appropriately.
The union of water, word and Spirit at baptism marks our departure from the old creation to the new and so acts as an eschatological sign of our new-exodus through the death and resurrection of Christ. Just as Israel passed through the waters of the Red Sea and escaped the bondage of Egypt, so we pass through the waters of baptism and are set free from the bondage of sin to new life, a more abundant life.