Because you are sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” So you are no longer a slave, but God’s child; and since you are his child, God has made you also an heir. – Galatians 4:6-7.
The first vocalizations of many babies are the syllables “ab-ba, ab-ba, ab-ba.” Not surprisingly, in Jesus’ day, abba was the tender name babies used for their physical fathers. When God saved us, he gave us his Spirit. The Holy Spirit blesses us in many ways. One of the key blessings is the Spirit’s work with us in prayer. He intercedes for us when words can’t express the emotions we have inside us (Romans 8:26-27). The Spirit helps us approach God with familiarity, dependency, and respect as we call God our Abba Father.