To a generation that believed it could repose in Positivism in philosophy, utilitarianism in morals, and naturalism in art and poetry, has succeeded a generation that torments itself more than ever with the mystery of things, that is attracted by the ideal, that dreams of social fraternity, of self-renunciation, of devotion to the little, to the miserable, to the oppressed--devotion like the heroism of Christian love. Hence what has been called the renaissance of Idealism, the return, _i.e._, to general ideas, to faith in the invisible, to the taste for symbols, and to those longings, as confused as they are ardent, to discover a religion or to return to the religion their fathers have disdained. Our young people, it seems to me, are pushing bravely forward, marching between two high walls: on the one side modern science with its rigorous methods which it is no longer possible to ignore or to avoid; on the other, the dogmas and the customs of the religious institutions in which they were reared, and to which they would, but cannot, sincerely return. The sages who have led them hitherto point to the impasse they have reached, and bid them take a part,--either for science against religion, or for religion against science. They hesitate, with reason, in face of this alarming alternative. Must we then choose between pious ignorance and bare knowledge? Must we either continue to live a moral life belied by science, or set up a theory of things which our consciences condemn? Is there no issue to the dark and narrow valley which our anxious youth traverse? I think there is. I think I have caught glimpses of a steep and narrow path that leads to wide and shining table-lands above. Indeed I have ascended in the footsteps of some others, and I signal in my turn to younger, braver pioneers who, in course of time, will make a broader, safer road, along which all the caravan may pass. BOOK FIRST RELIGION CHAPTER I ON THE PSYCHOLOGICAL ORIGIN, AND ON THE NATURE OF RELIGION 1. _First Critical Reflections_ Why am I religious? Because I cannot help it: it is a moral necessity of my being. They tell me it is a matter of heredity, of education, of temperament. I have often said so to myself. But that explanation simply puts the problem further back; it does not solve it