Any sort of reaction against the primeval fear with which man contemplates the unknown, is religion. The passionate craving of human beings for a love which changes not nor passes away, is religion.
The desperate longing to find an idea, a principle, a truth, a "cause," for the sake of which we can sacrifice our personal pleasure and our personal selfishness, is religion.
The craving for some unity, some synthesis, some universal meaning in the system of things, is religion. The desire for an "over-life" or an "over-world," in which the distress, disorder, misunderstandings and cruelties of our present existence are redeemed, is religion.
The desire to find something real and eternal behind the transient flow of appearance, is religion. The desire to force upon others by violence, by trickery, by fire, by sword, by persecution, by magic, by persuasion, by eloquence, by martyrdom, an idea which is more important to us than life itself, is religion.
It will be seen from this brief survey of the immense field which the word "religion" has come to cover, that I am justified in regarding it rather as a name given to the emotional thrill and ecstatic abandonment which accompanies any sort of co-ordination of the attributes of the complex vision, proportioned or disproportioned, than as a distinct and separate attribute in itself.
Only when the co-ordination of our human activities rises to the height of a supreme music, can we regard "religion" as the most beautiful and most important of all human experiences. And at the moment when it takes this form it resolves itself into nothing more than an unutterable feeling of ecstasy produced by the sense that we are in harmony with the rest of the universe. Religion, as I am compelled to think of it, resolves itself into that reaction of unspeakable happiness produced in us, when by any kind of synthetic movement, however crude, we are either saved from unreality or reconciled to reality.
Religion is, in fact, the name we give to the ecstasy in the heart of the complex vision, when, in any sort of coordination between our contradictory energies, we at once escape from ourselves and realize ourselves. We are forbidden to speak of the "religious sense" or the "religious instinct" because, truly interpreted, religion is not a single activity among other activities, but the emotional reaction upon our whole nature when that nature is functioning in its creative fulness.