What is the highest privilege of the gospel?
What is a Christian? The question can be answered in many ways, but the richest answer I know is that a Christian is one who has God as Father.
If you want to judge how well a person understands Christianity, find out how much he makes of the thought of being God’s child, and having God as his Father. If this is not the thought that prompts and controls his worship and prayers and his whole outlook on life, it means that he does not understand Christianity very well at all…
Adoption… is the highest privilege that the gospel offers: higher even than justification… To be right with God the Judge is a great thing, but to be loved and cared for by God the Father is a greater.
J. I. Packer, Knowing God, 200-201, 206.