After this he continues: “Their union is the more wonderful, the more it can be shown to be based on no substantial reason. And yet rebellion is a substantial reason, as well as the advantages which accrue from it, and the fear of external enemies. Such are the causes which give stability to their faith.” To this we answer, that our union does thus rest upon a reason, or rather not upon a reason, but upon the divine working,[286] so that its commencement was God’s teaching men, in the prophetical writings, to expect the advent of Christ, who was to be the Saviour of mankind. For in so far as this point is not really refuted (although it may _seem_ to be by unbelievers), in the same proportion is the doctrine commended as the doctrine of God, and Jesus shown to be the Son of God both before and after His incarnation. I maintain, moreover, that even after His incarnation, He is always found by those who possess the acutest spiritual vision to be most God-like, and to have really come down to us from God, and to have derived His origin or subsequent development not from human wisdom, but from the manifestation[287] of God within Him, who by His manifold wisdom and miracles established Judaism first, and Christianity afterwards; and the assertion that rebellion, and the advantages attending it, were the originating causes of a doctrine which has converted and improved so many men was effectually refuted. Footnote 286: θείας ἐνεργείας. Footnote 287: ἐπιφανείας. Chapter XV. But again, that it is not the fear of external enemies which strengthens our union, is plain from the fact that this cause, by God’s will, has already, for a considerable time, ceased to exist. And it is probable that the secure existence, so far as regards the world, enjoyed by believers at present, will come to an end, since those who calumniate Christianity in every way are again attributing the present frequency of rebellion to the multitude of believers, and to their not being persecuted by the authorities as in old times. For we have learned from the gospel neither to relax our efforts in days of peace, and to give ourselves up to repose, nor, when the world makes war upon us, to become cowards, and apostatize from the love of the God of all things which is in Jesus Christ. And we clearly manifest the illustrious nature of our origin, and do not (as Celsus imagines) conceal it, when we impress upon the minds of our first converts a contempt for idols, and images of all kinds, and, besides this, raise their thoughts from the worship of created things instead of God, and elevate them to the universal Creator; clearly showing Him to be the subject of prophecy, both from the predictions regarding Him—of which there are many—and from those traditions which have been carefully investigated by such as are able intelligently to understand the Gospels, and the declarations of the apostles. Chapter XVI.