Vine tells us that Abba is the word framed by infants, and shows blind trust. It is a word of love, endearment, closeness. These verses teach us that our Father is much more than a distant figure directing our lives from afar. He is our spiritual Daddy, active in all parts of our lives. Our culture has degenerated to the point that fathers do not get the respect that they once did.
Many fathers do very little to inspire respect from their children.
As a dad, I have made numerous mistakes in discipline and caring for my children. I have incorrectly assessed situations and meted out unfair punishment and restrictions. No child of God can charge his Father with such wrongs. He has complete knowledge and perfect wisdom in dealing with His children. Like Israel, we take Him for granted and fail to honor Him as a Father.