We have now endeavoured to explain some of the difficulties which a comparison of St. Paul's own autobiographical narrative with the Acts discloses. Let us look again at the retirement into Arabia. This retirement seems to us full of instruction and pregnant with meaning for the hidden as well as the practical life of the soul. St. Paul as soon as he was baptized retired into Arabia; and why, it may be asked, did he retire thither? Some of the ancient expositors, as St. Chrysostom and St. Jerome, both of whom wrote about the same period, A.D. 400, thought that St. Paul retired into Arabia in order that he might preach to the Arabians. St. Chrysostom, for instance, comments thus: "See how fervent was his soul, he was eager to occupy lands yet untilled. He forthwith attacked a barbarous and savage people, choosing a life of conflict and of much toil." And the explanations of Hilary, Theodore of Mopsuestia, Theodoret, and Œcumenius, all of them ancient and acute expositors, are of exactly the same character. Now this would have been a reversal of the Divine order in one important aspect. The power of the keys, the office of opening the kingdom of heaven to the Gentiles had been committed to St. Peter by Jesus Christ. He had not as yet baptized Cornelius, and thus formally opened the door of faith to the Gentiles. If St. Paul had preached to the Arabians, he would have usurped St. Peter's place and function. We believe, on the other hand, that God led the converted persecutor into the deserts of Arabia for very different purposes. Let us note a few of them.