Whether it is fitting that God should adopt sons?

Objections

Objection 1 : It would seem that it is not fitting that God should adopt sons. For, as jurists say, no one adopts anyone but a stranger as his son. But no one is a stranger in relation to God, Who is the Creator of all. Therefore it seems unfitting that God should adopt.
Objection 2 : Further, adoption seems to have been introduced in default of natural sonship. But in God there is natural sonship, as set down in the FP, Question [27], Article [2]. Therefore it is unfitting that God should adopt.
Objection 3 : Further, the purpose of adopting anyone is that he may succeed, as heir, the person who adopts him. But it does not seem possible for anyone to succeed God as heir, for He can never die. Therefore it is unfitting that God should adopt.