In the Christological Epistles accordingly it is apparent that the Pauline churches are learning to think of the coming Kingdom in a widely different way from the 'apostolic.' The Greek doctrine of mystic union, not the rabbinic of a "share in the world to come," is the basis. In due time we shall see how difficult the process of reconciliation became between Greek and Semitic thought in this field also. For the present we can only note how in the great theme of the Unity of the Spirit in Eph. iv. 1--vi. 9 it is not the 'apostolic' ideal of a restoration of the kingdom to Israel according to the oath sworn to Abraham (Luke i. 68-75; _cf._ Acts i. 6) that dominates, but an enlargement of the figure of the body and members, a figure commonly employed by Stoic writers, to apply to the unity of the church in Corinthians and Romans. In the Epistles of the Captivity the doctrine of the Kingdom is a social organism permeated and vitalized by Christ's spirit of service. Personal immortality is union with the life of God. In view of the notoriety of Ephesus as the very centre of the trade in magic (so much so that spells and incantations were technically known as "Ephesian letters") and of what Acts tells us of the enormous destruction there of "books of magic" effected by Paul's preaching, it is not surprising that Asia and Phrygia should appear a few years after Paul's departure as the hot-bed of a "philosophy and vain deceit, after the tradition of men, after the 'elements' of the world, and not after Christ." Acts xx. 29 makes Paul predict the heresy.