Book One, Chapter One, The Human Aspiration

...

We speak of the evolution of Life in Matter, the evolution of Mind in Matter; but evolution is a word which merely states the phenomenon without explaining it. For there seems to be no reason why Life should evolve out of material elements or Mind out of living form, unless we accept the Vedantic solution that Life is already involved in Matter and Mind in Life because in essence Matter is a form of veiled Life, Life a form of veiled Consciousness. And then there seems to be little objection to a farther step in the series and the admission that mental consciousness may itself be only a form and a veil of higher states which are beyond Mind. In that case, the unconquerable impulse of man towards God, Light, Bliss, Freedom, Immortality presents itself in its right place in the chain as simply the imperative impulse by which Nature is seeking to evolve beyond Mind, and appears to be as natural, true and just as the impulse towards Life which she has planted in certain forms of Matter or the impulse towards Mind which she has planted in certain forms of Life. As there, so here, the impulse exists more or less obscurely in her different vessels with an ever-ascending series in the power of its will-to-be; as there, so here, it is gradually evolving and bound fully to evolve the necessary organs and faculties. As the impulse towards Mind ranges from the more sensitive reactions of Life in the metal and the plant up to its full organisation in man, so in man himself there is the same ascending series, the preparation, if nothing more, of a higher and divine life. The animal is a living laboratory in which Nature has, it is said, worked out man. Man himself may well be a thinking and living laboratory in whom and with whose conscious co-operation she wills to work out the superman, the god. Or shall we not say, rather, to manifest God? For if evolution is the progressive manifestation by Nature of that which slept or worked in her, involved, it is also the overt realisation of that which she secretly is. We cannot, then, bid her pause at a given stage of her evolution, nor have we the right to condemn with the religionist as perverse and presumptuous or with the rationalist as a disease or hallucination any intention she may evince or effort she may make to go beyond. If it be true that Spirit is involved in Matter and apparent Nature is secret God, then the manifestation of the divine in himself and the realisation of God within and without are the highest and most legitimate aim possible to man upon earth.
...