The object of mystic contemplation is the One indivisible. But we can also think the One as the unity of all differences, the Circle of the Universe. Those natures also which, like Amiel's, are "bedazzled with the Infinite" and thirst for "totality" attain in their reveries to the same impersonal ecstasy. Amiel writes of a "night on the sandy shore of the North Sea, stretched at full length upon the beach, my eyes wandering over the Milky Way. Will they ever return to me, those grandiose, immortal, cosmogonic dreams, in which one seems to carry the world in one's breast, to touch the stars, to possess the Infinite!" The reverie of Senancour, on the bank of the Lake of Bienne, quoted by Matthew Arnold, reveals the same emotion: "Vast consciousness of a nature everywhere greater than we are, and everywhere impenetrable; all-embracing passion, ripened wisdom, delicious self-abandonment." In the coincidence of outer circumstance-- the lake, the North Sea, night, the attitude of repose--may we not trace a dissolution of the self-background, similar to that of the mystic worshiper? And in the Infinite, no less than in the One, must the soul sink and melt into union with it, because within it there is no determination, no pause, and no change. The contemplation of the One, however, is not the only type of mystic ecstasy. That intoxication of emotion which seizes upon the negro camp meeting of to-day, as it did upon the Delphic priestesses two thousand years ago, seems at first glance to have nothing in common psychologically with the blessed nothingness of Gautama and Meister Eckhart. But the loss of the feeling of personality and the sense of possession by a divine spirit are the same. How, then, is this state reached? By means, I believe, which recall the general formula for the Disappearance of self-feeling. To repeat the monosyllable OM (Brahm) ten thousand times; to circle interminably, chanting the while, about a sacred ire; to listen to the monotonous magic drum; to whirl the body about; to rock to and fro on the knees, vociferating prayers, are methods which enable the members of the respective sects in which they are practiced either to enter, as they say, into the Eternal Being, or to become informed with it through the negation of the self. The sense of personality, at any rate, is more or less completely lost, and the ecstasy takes a form more or less passionate, according as the worshiper depends on the rapidity rather than on the monotony of his excitations. Here, again, the self- background drops, inasmuch as every rhythmical movement tends to become automatic, and then unconscious. Thus what we are wont to call the inspired madness of the Delphic priestesses was less the expression of ecstasy than the means of its excitation. Perpetual motion, as well as eternal rest, may bring about the engulfment of the self in the object. The most diverse types of religious emotions, IN SO FAR AS THEY