Thought is a chemical process, the most interesting of all transfusions in liquid solution. The mind is an up-spurt of sperm, no, let me alter that; trying to watch the process: the sperm, the form-creator, the substance which compels the ovule to evolve in a given pattern, one microscopic, minuscule particle, entering the "castle" of the ovule.

"Thought is a vegetable" says a modern hermetic, whom I have often contradicted, but whom I do not wish to contradict at this point. Thought is a "chemical process" in relation to the organ, the brain; creative thought is act like fecundation, like the male cast of the human seed, but given that cast, that ejaculation, I am perfectly willing to grant that the thought once born, separated, in regard to itself, not in relation to the brain that begat it, does lead an independent life much like a member of the vegetable kingdom, blowing seeds, ideas from the paradisal garden at the summit of Dante's Mount Purgatory, capable of lodging and sprouting where they fall. And Gourmont has the phrase "fecundating a generation of bodies as genius fecundates a generation of minds."

Man is the sum of the animals, the sum of their instincts, as Gourmont has repeated in the course of his book. Given, first a few, then as we get to our own condition, a mass of these spermatozoic particles withheld, in suspense, waiting in the organ that has been built up through ages by a myriad similar waitings.

Each of these particles is, we need not say, conscious of form, but has by all counts a capacity for formal expression: is not thought precisely a form-comparing and form-combining?

That is to say we have the hair-thinning "abstract thought" and we have the concrete thought of women, of artists, of musicians, the mockedly "long-haired," who have made everything in the world. We have the form-making and the form-destroying "thought," only the first of which is really satisfactory. I don't wish to be invidious, it is perfectly possible to consider the "abstract" thought, reason, etc., as the comparison, regimentation, and least common denominator of a multitude of images, but in the end each of the images is a little spoiled thereby, no one of them is the Apollo, and the makers of this kind of thought have been called dry-as-dust since the beginning of history. The regiment is less interesting as a whole than any individual in it. And, as we are being extremely material and physical and animal, in the wake of our author, we will leave old wives' gibes about the profusion of hair, and its chance possible indication or sanction of a possible neighbouring health beneath the skull.

Creative thought has manifested itself in images, in music, which is to sound what the concrete image is to sight. And the thought of genius, even of the mathematical genius, the mathematical prodigy, is really the same sort of thing, it is a sudden out-spurt of mind which takes the form demanded by the problem; which creates the answer, and baffles the man counting on the abacus.

I query the remarks about the sphex in Chapter XIX, "que le sphex s'est formé lentement," I query this with a conviction for which anyone is at liberty to call me lunatic, and for which I offer no better ground than simple introspection. I believe, and on no better ground than that of a sudden emotion, that the change of species is not a slow matter, managed by cross-breeding, of nature's leporides and bardots, I believe that the species changes as suddenly as a man makes a song or a poem, or as suddenly as he starts making them, more suddenly than he can cut a statue in stone, at most as slowly as a locust or long-tailed Sirmione false mosquito emerges from its outgrown skin. It is not even proved that man is at the end of his physical changes. Say that the diversification of species has passed its most sensational phases, say that it had once a great stimulus from the rapidity of the earth's cooling, if one accepts the geologists' interpretation of that thermometric cyclone.

The cooling planet contracts, it is as if one had some mud in a tin pail, and forced down the lid with such pressure that the can sprung a dozen leaks, or it is as if one had the mud in a linen bag and squeezed; merely as mechanics (not counting that one has all the known and unknown chemical elements cooling simultaneously), but merely as mechanics this contraction gives energy enough to squeeze vegetation through the pores of the imaginary linen and to detach certain particles, leaving them still a momentum. A body should cool with decreasing speed in measure as it approaches the temperature of its surroundings; however, the earth is still, I think, supposed to be warmer than the surrounding unknown, and is presumably still cooling, or at any rate it is not proved that man is at the end of his physical changes. I return to homed gods and the halo in a few paragraphs. It is not proved that even the sort of impetus provided by a shrinking of planetary surface is denied one.

What is known is that man's great divergence has been in the making of detached, resumable tools.

That is to say, if an insect carries a saw, it carries it all the time. The "next step," as in the case of the male organ of the nautilus, is to grow a tool and detach it.