primitive human world. All the emanations of the human body, all the spontaneous manifestations of its activities, were mysterious and ominous to early man, pregnant with terror unless met with immense precautions and surrounded by careful ritual. The manifestations of sex were the least intelligible and the most spontaneous. Therefore the things of sex were those that most lent themselves to feelings of horror and awe, of impurity and of purity. They seemed so highly charged with magic potency that there were no things that men more sought to avoid, yet none to which they were impelled to give more thought. The manifold echoes of that primitive conception of sex, and all the violent reactions that were thus evolved and eventually bound up with the original impulse, compose the streams of tradition that feed our modern world in this matter and determine the ideas of purity that surround us.
At the present day the crude theory of the sexual impulse held on one side, and the ignorant rejection of theory altogether on the other side, are beginning to be seen as both alike unjustified. We begin to find the grounds for a sounder theory. Not indeed that the problems of sex, which go so deeply into the whole personal and social life, can ever be settled exclusively upon physiological grounds. But we have done much to prepare even the loftiest Building of Love
