When my sons address me as “Daddy,” it signifies greater love and intimacy, greater confidence with me. I am their loving protector and benefactor. “Father” sounds like too much respect, stand-offishness, emotional detachment and formality. “Father” is good for dead religion. But if you want answers to prayer, “Daddy” sets a better tone. “Daddy” musters faith.
I believe this is what Paul communicates. Because you are sons, God sent the Spirit of his Son into our hearts, the Spirit who calls out, “Abba, Father.” — Gal. 4:6 (See also Mark 14:36 and Rom. 8:15). You are not addressing an overbearing, unwilling, disciplinary “Father” but a loving “Daddy” whose very heart beats to give what you want and need.
When my kids need new shoes (though I don’t have money), I am looking to see what I can do to get them.I give to my kids as many good things as I can. I prefer to give to them rather than myself. Don’t you think our Daddy in Heaven is that way? I do. Today, address God as “Daddy.”