The difficulty is not so serious as it seems. Genius is not incompatible with honesty--certainly not the genius of Paul. When, therefore, Paul sets himself to give information about certain plain matters of fact that came under his observation, as in the first two chapters of Galatians, there are not many historians who are inclined to refuse him credence. But the witness of Paul depends not so much upon details as upon the total fact of his religious life. It is that fact which is to be explained. To say merely that Paul was a genius and therefore unaccountable is no explanation. Certainly it is not an explanation satisfactory to modern historians. During the progress of modern criticism, students of the origin of Christianity have accepted the challenge presented by the fact of Paul's religious life; they have felt obliged to account for the emergence of that fact at just the point when it actually appeared. But the explanations which they have offered, as the following discussion may show, are insufficient; and it is just the greatness of Paul for which the explanations do not account. The religion of Paul is too large a building to have been erected upon a pin-point. Moreover, the greater a man is, the wider is the area of his contact with his environment, and the deeper is his penetration into the spiritual realm. The "man in the street" is not so good an observer as is sometimes supposed; he observes only what lies on the surface. Paul, on the other hand, was able to sound the depths. It is, on the whole, certainly no disadvantage to the student of early Christianity that that particular member of the early Church whose inner life stands clearest in the light of history was no mere nonentity, but one of the commanding figures in the history of the world. But what, in essence, is the fact of which the historical implications are here to be studied? What was the religion of Paul? No attempt will now be made to answer the question in detail; no attempt will be made to add to the long list of expositions of the Pauline theology. But what is really essential is abundantly plain, and may be put in a word--the religion of Paul was a religion of redemption. It was founded not upon what had always been true, but upon what had recently happened; not upon right ideas about God and His relations to the world, but upon one thing that God had done; not upon an eternal truth of the fatherhood of God, but upon the fact that God had chosen to become the Father of those who should accept the redemption offered by Christ. The religion of Paul was rooted altogether in the redeeming work of Jesus Christ. Jesus for Paul was primarily not a Revealer, but a Saviour.