Such has been the course of religion through the centuries of human history, and amid the complex and confused development of particular faiths. The progress has not been on a straight line and by successive additions, as in the scientific sphere. Religious evolution is more like the evolution of art, in which the experience of the past is only fruitful when translated by a higher inspiration and a mightier creative force. There are periods of recrudescence of the religious sentiment in which the passions of a past that seemed to have been abolished are revived. These are the times of superstition. There are also periods of religious inertia, when the soul seems to empty itself of its eternal content, and divert itself into a frivolous activity and a superficial wisdom. These are the ages of incredulity. Lastly, there are epochs of crisis and confusion, in which mingle religious traditions the most diverse, and currents of thought the most contrary. We must pass over all these accidents and vicissitudes. In the religious evolution of humanity there is a sequence, an order, a progress which, in spite of all interruptions and reactions, manifest themselves as soon as we rise high enough to embrace it in its vast entirety. * * * * * A few years ago there assembled in Chicago what the Americans called the Parliament of Religions. The official representatives of all the principal religions of the new world and the old met together under a common feeling of religious brotherhood. They did not discuss the value of their rites or dogmas; their object was to approach each other, to edify each other, and, for the first time in the world's history, to present the spectacle of a universal religious communion. When it came to the point, three things became clear: first, the common name under which they were able to call upon God--the Father; secondly, the Lord's Prayer was adopted and recited by all; thirdly, Christ Himself, apart from all theological definition, was unanimously recognised and venerated as the Master and Initiator of the higher religious life. In my own consciousness, this practical demonstration is completed. I can hardly help being religious; but if I am seriously to be religious I can only be so under the Christian form. I can hardly help praying; but if I desire to pray, if moral anguish or intellectual doubt constrain me to seek some form of prayer that I can use in all sincerity, I never find but these words: "Our Father which art in heaven." Lastly, I may disdain the inner life of the soul, and divert myself from it by the distractions of science, art, and social life; but if, wearied by the world of pleasure or of toil, I wish to find my soul again and live a deeper life, I can accept no other guide and master than Jesus Christ, because, in Him alone, optimism is without frivolity, and seriousness without despair. BOOK SECOND CHRISTIANITY CHAPTER I