If your sins are washed away by the blood of Christ, if you are resurrected and if you live with Christ, if you sin no more, if you are a joint-heir with Christ, if you sit with Christ on his throne, if you have been faithful over a few things and are made ruler over many things, then what are you? A king unto the King of kings? A lord unto the Lord of lords? Why not a god unto the God of gods? It really comes down to semantics like the author states. We could call ourselves fish unto the Fish of fishes.
Obviously God calls us his children and himself our Father. God does not lie. We are his literal children and he is literally our Father as the scriptures say repeatedly. Therefore man is the literal family of God and even though we are fallen man and sinful, God provided a Savior, even Jesus Christ, that we can become like our Father and be perfected through the blood of Christ and become as He is and reach our divine potential and become gods with Christ as our Savior and God as our Father.
My Dad always suspected SOMETHING funny went on!