This treatise on the Upanishads illustrates the teaching of the ancient Indian seers and is presented in the clearest light, and claims the sympathetic study of all lovers of truth. It discussed the philosophy of the Upanishads, the culminating point of the Indian doctrine of the universe. Divided into five parts entitled: introduction to the philosophy of the Upanishads; Part I: theology, or the doctrine of Brahman; Part II: cosmology, or the doctrine of the universe; Part III: psychology, or the doctrine of the soul; Part IV: eschatology, or the doctrine of transmigration and emancipation, including the way thither (practical philosophy).