2. The origin of a series of the most important Christian customs and ideas is involved in an obscurity which in all probability will never be cleared up. Though one part of those ideas may be pointed out in the epistles of Paul, yet the question must frequently remain unanswered, whether he found them in existence or formed them independently, and accordingly the other question, whether they are exclusively indebted to the activity of Paul for their spread and naturalisation in Christendom. What was the original conception of baptism? Did Paul develop independently his own conception? What significance had it in the following period? When and where did baptism in the name of the Father, Son and Holy Spirit arise, and how did it make its way in Christendom? In what way were views about the saving value of Christ's death developed alongside of Paul's system? When and how did belief in the birth of Jesus from a Virgin gain acceptance in Christendom? Who first distinguished Christendom, as [Greek: ekklêsia tou theou], from Judaism, and how did the concept [Greek: ekklêsia] become current? How old is the triad: Apostles, Prophets and Teachers? When were Baptism and the Lord's Supper grouped together? How old are our first three Gospels? To all these questions and many more of equal importance there is no sure answer. But the greatest problem is presented by Christology, not indeed in its particular features doctrinally expressed, these almost everywhere may be explained historically, but in its deepest roots as it was preached by Paul as the principle of a new life (2 Cor. V. 17), and as it was to many besides him the expression of a personal union with the exalted Christ (Rev. II. 3). But this problem exists only for the historian who considers things only from the outside, or seeks for objective proofs. Behind and in the Gospel stands the Person of Jesus Christ who mastered men's hearts, and constrained them to yield themselves to him as his own, and in whom they found their God. Theology attempted to describe in very uncertain and feeble outline what the mind and heart had grasped. Yet it testifies of a new life which, like all higher life, was kindled by a Person, and could only be maintained by connection with that Person. "I can do all things through Christ who strengtheneth me." "I live, yet not I, but Christ liveth in me." These convictions are not dogmas and have no history, and they can only be propagated in the manner described by Paul, Gal. I. 15, 16.