I was involved in a discussion on another blog, in which I claimed that God is humanity's Father from birth. I justified this with sections such as the Sermon on the Mount, where Jesus tells the entire crowd that God is their Father. The person discussing the matter with me claimed that God is only one's Father after one is "saved." You are then adopted into God's family.
I find the latter view interesting, simply on how adoption works. When a child is adopted, there are two parents involved in the process. Parent A is the parent who gave birth to the child. Parent B is the parent who then adopts and raises the child, and legally is entitled to all rights and decisions regarding said child. However, Parent A and Parent B are never the same person (to my knowledge. Someone with a better familiarity with the law might want to chime in). I know that Parent A could lose parental rights, but if s/he has the opportunity to regain those rights, it's not considered adoption, which is "to take voluntarily (a child of other parents) as one's own child."
So, if God must adopt us in order for us to be children, that makes God parent B. Who, then, is parent A? Who is God adopting us from? I'm fairly certain the standard answer here would be Satan or the world or the flesh or possibly a combination of all three.
But what does that mean? The very act of creation is attributed to God and only God. Satan didn't create us, nor the world, nor even “the flesh”. If we are here, it's because God has decided that we should be born in this particular time. If God didn't decide to embark on the act of creation, we wouldn't be here.
Yet somehow, that doesn't make God a parent, nor does that give humanity the right to consider God a Father (the other blogger's perspective). But why not? That is part of what makes a parent an actual parent – s/he played a role in your creation.
Only, per this viewpoint, that’s not enough. You must choose to be adopted into God’s family (assuming a non-Calvinist viewpoint here), and then you can call God Father.
Okay. We still come back to the idea of who was our original, or first, parent? If you go with the idea of something not-God, then that calls into question how much “ownership” God has over us, and how much right God then has to demand any sort of obedience or allegiance, if He’s not even the Creator in the first place.
If we take this metaphorically, and say that Satan is our Father until said adoption takes place, then at what point did Satan become our Father? Clearly not in the aspect of creation.