" the conclusion that Jesus said `Abba' to God for precisely the same reason that (most of) his contemporaries refrained from its use in prayer - viz., because it expressed his attitude to God as Father, his experience of God as one of unusual intimacy.60 "

― James D.G. Dunn , Jesus and the Spirit: A Study of the Religious and Charismatic Experience of Jesus and the First Christians as Reflected in the New Testament