The real nature of the conflict is often obscured by the fact of social opinion and the social forces generally being on the side of the more normal expression of sexual life. This, however, is no more than a necessity of the situation. The continuance of a healthful social life is dependent upon the maintenance of a certain balance in the relations of the sexes, and anything that strikes at this strikes at social life as a whole. In such cases we have, therefore, to allow for the operation of social selection, which is always on the side of the more normal type. From this it follows that although a small body of people may exemplify a variation that is in itself socially disastrous, the main forces of social life will prevent its ever assuming large dimensions. Moreover, a large body of people, such as is represented by a church holding a commanding position in society, will be forced to come to terms with the permanent tendencies of social life, and will either suppress undesirable variations or expel them. It thus happens that while the larger and more dominant churches have been on the side of normal, regularised expressions of the sexual life, abnormal variations have constantly arisen and have been denounced by them. But the significant feature is that they have arisen within the churches, and most commonly during periods of great religious stress or excitement. These tendencies, as the Rev. S. Baring-Gould has pointed out, existed in the very earliest days of Christianity. It is quite apparent from Paul's writings that as early as the date of the First Epistle to the Corinthians some of the more objectionable features of the older Pagan worship had shown themselves in the Church. The doctrine of 'spiritual wifehood' appeared at a very early date in the Church, and its teachers cited even St. Paul himself as their authority. Their claim was based upon Paul's declaration (1 Cor. ix. 5) that he had power to lead about "a sister, a wife, as well as other apostles, and as the brethren of the Lord and Cephas." Curiously enough, commentators have never agreed as to what Paul meant by this expression. The word translated may mean either wife, or sister, or woman. Had it been wife in the ordinary sense, it does not appear that at that date there would have been any room for scandal. The clear fact is, however, that others claimed a like privilege; the privilege was not always restricted to one woman, and the practice, if not general, became not uncommon, and furnished the ground for scandal for a long period. Two epistles, wrongly attributed to St. Clement of Rome, and dating from some time in the second century, condemn the practice of young people living together under the cloak of religion, and specially warns virgins against cohabiting with the clergy and so giving offence. That the practice was difficult to suppress is shown by its being condemned by several church councils--Antioch in 210,