HP: Our relationship with our earthly children is only 'in some limited way' akin to the relationship we have with our Heavenly Father. God is the Father of all in a limited sense, but there is a point you missed in your father/son illustration. God is in the end going to be the judge of all and at that time will willingly separate for all eternity from those that did not repent, something a father/son relationship as you paint it does not and cannot set forth as it is in reality.
The Father/son relationship is used all throughout Scripture.
It is used in John 3 to illustrate what it means to be born again.
One is born only once into this world; he is born only once into the family of God. Jesus said very clearly: Except a man be born again he cannot enter the kingdom of God.
He did not say: Except a man be born again, and again, and again. There is only one new birth, and once born into the family of God one cannot be "unborn." The concept is just ludicrous.
The concept is taught in John 1
Jesus came to his own but his own received him not. Next verse:
John 1:12 But as many as received him, to them gave he power to become
the sons of God, even to them that believe on his name:
--Other translations say "children of God," which is more accurate. We become a child of God through faith, believing in his name.
Verse 13 adds even more detail.
John 1:13
Which were born, not of blood, nor of the will of the flesh, nor of the will of man,
but of God.
--Our birth into the family of God must be of God--a spiritual birth.
It is not of blood. This shoots covenant theology. One cannot be born a Christian.
It is not of the will of the flesh. You cannot become a Christian by simple reformation.
It is not of the will of man--joining a church, baptism, or any of the other rites of mankind's religions.
It is only by God. You must be born again, born from above, born by the Holy Spirit of God. Once that is accomplished God never disowns, disinherits, "unborns" His own. We are His forever.
The story of the Prodigal Son.
The first thing to note that meaning of the word "prodigal" is one who has gone astray. It is not one who is completely lost, but one who has strayed.
Having noted that this is a son, who remained a son, but a son that had strayed from his father. He remained his father's son. That fact could never be changed. When he came home he was not welcomed as a servant, but as a son. The father's attitude was that his "lost" son was found; lost in the sense of strayed. He was lost in that he didn't know where he was; what he was doing. It is a human picture of a parent not knowing where his son was. But God, contrary to a human father, is omniscient, and knows all things. So you can't stretch the parable to fit all points. He was still a son; we always will be a son. The parable points out the differences between the two sons. They were both sons; and both had wrongs that needed to be corrected.
There still is a Father/son relationship. The son was always a son to the father--a bond that could never change. Every day the father waited and watched for the return of his
son.
Christ uses parables to teach heavenly truths, as he did here. This truth is taught over and over again, and cannot be denied.
"Our Father who art in heaven..." The unsaved cannot rightly pray this prayer. They don't have a heavenly father.
Satan is their father. They need to be born again.
If one is born once; they will die twice.
If one is born twice; they will die once.