J. Gresham Machen,
The Origin of Paul's Religion
“ The fatherhood of God in Paul is not something to be argued about or defended; it is altogether a matter of course. But it has not lost, through repetition, one whit of its freshness. The name "Father" applied to God in Paul is more than a bare title; it is the welling up of the depths of the soul. "Abba, Father" on the lips of Paul's converts was exactly the same, not only in form but also in deepest import, as the word which Jesus first taught His disciples when they said to Him, "Lord, teach us to pray." ”
