The "Upanishads" are reckoned to be from a hundred and fifty to a hundred and seventy in number. The date of the earliest of them is about B.C. 600; that is an age anterior to the rise of Buddha. They consist of various disquisitions on the nature of man, the Supreme Being, the human soul, and immortality. They are part of Sanscrit Brahmanic literature, and have the authority of revealed, in contradistinction to traditional truth. We see in these books the struggle of the human mind to attain to a knowledge of God and the destiny of man. The result is the formulation of a definite theosophy, in which we find the Brahman in his meditation trusting to the intuitions of his own spirit, the promptings of his own reason, or the combinations of his own fancy, for a revelation of the truth. The result is given us in these wonderful books. We call them wonderful, because the unaided mind of man never attained, in any other literature, to a profounder insight into spiritual things. The Western reader may find in an "Upanishad" many things that seem to him trifling and absurd, many things obscure and apparently meaningless. It is very easy to ridicule this kind of literature. But as a matter of fact these ancient writings well repay study, as the most astounding productions of the human intellect. In them we see the human mind wrestling with the greatest thoughts that had ever yet dawned upon it, and trying to grasp and to measure the mighty vision before which it was humbled to the dust. The seer, in order to communicate to the world the result of his meditations, seems to catch at every symbol and every word hallowed by familiar usage, in order to set out in concrete shape the color and dimensions of mystic verities; he is employing an old language for the expression of new truths; he is putting new wine into old wine-skins, which burst and the wine is spilt; words fail, and the meaning is lost. It is not lost, however, to those who will try to study the "Upanishads" from within, and not from without: who will try to put himself in the attitude of those earnest and patient explorers who brought so much light into the human life of the East, and so much joy and tranquillity to the perturbed spirit of their fellow-men. Those who thus study these ancient writings will find in them the fundamental principles of a definite theology, and, more wonderful still, the beginnings of that which became afterwards known to the Greeks, and has been known ever since, as metaphysics: that is, scientific transcendentalism. This much will be apparent to anyone who will read and study the "Kaushîtaki- Upanishad," which is one of the most wonderful of the religious books of the East. Laying aside the doctrine of metempsychosis and the idea of reincarnation, there is something sublime and inspiring in the imagery with which the destiny of the soul after death is described, while in the metaphysical subtlety of this book we find an argument against