First published in 1875. The book begins: "Time cannot be thoroughly defined, nor even properly comprehended by mankind, for our personal acquaintance with it is so brief that our longest term is compared to a span, and to 'the grass which in the morning is green and groweth up, and in the evening is cut down and withered.' The ordinary thinker can scarcely carry his idea of Time beyond that small portion of it which he has known, under the name of life-time. The metaphysician classes Time with those other mysteries, Space, Matter, Motion, Force, Consciousness, which are the Gordian knots of Mental Science. Time is naturally divided into three most unequal parts, whereof the Past includes all that has happened until now from that far-distant period when 'Heaven and Earth rose out of chaos;' the Present is but a moment, expended in a breath, to be again like that breath momentarily renewed; the Future is, as the Past,'a wide unbounded prospect,' an 'undiscovered country,' into which Prophecy itself penetrates but partially, and even then bears back to us but small information; for its language catches the character of a grander clime, and the denizens of this lower earth are incapable of understanding its gorgeous metaphors; the brightness is as blinding as the darkness."