27. As we see in husbandry, when the rain fall from the clouds or the overflow from the river channels causes the land beneath it to be saturated with moisture (let us suppose for our argument a garden, nourishing within its own compass countless varieties of trees, and all the forms of plants that grow from the ground, and whereof we contemplate the figure, quality, and individuality in great variety of detail); then, as these are nourished by the liquid element while they are in one spot, the power which supplies moisture to each individual among them is one in nature; but the individuality of the plants so nourished changes the liquid element into different qualities; for the same substance becomes bitter in wormwood, and is changed into a deadly juice in hemlock, and becomes different in different other plants, in saffron, in balsam, in the poppy: for in one it becomes hot, in another cold, in another it obtains the middle quality: and in laurel and mastick it is scented, and in the fig and the pear it is sweetened, and by passing through the vine it is turned into the grape and into wine; while the juice of the apple, the redness of the rose, the radiance of the lily, the blue of the violet, the purple of the hyacinthine dye, and all that we behold in the earth, arise from one and the same moisture, and are separated into so many varieties in respect of figure and aspect and quality; the same sort of wonder is wrought in the animated soil of our being by Nature, or rather by Nature’s Lord. Bones, cartilages, veins, arteries, nerves, ligatures, flesh, skin, fat, hair, glands, nails, eyes, nostrils, ears,—all such things as these, and countless others in addition, while separated from one another by various peculiarities, are nourished by the one form of nourishment in ways proper to their own nature, in the sense that the nourishment, when it is brought into close relation with any of the subjects, is also changed according to that to which it approaches, and becomes adapted and allied to the special nature of the part. For if it should be in the neighbourhood of the eye, it blends with the visual part and is appropriately distributed by the difference of the coats round the eye, among the single parts; or, if it flow to the auditory parts, it is mingled with the auscultatory nature, or if it is in the lip, it becomes lip; and it grows solid in bone, and grows soft in marrow, and is made tense with the sinew, and extended with the surface, and passes into the nails, and is fined down for the growth of the hair, by correspondent exhalations, producing hair that is somewhat curly or wavy if it makes its way through winding passages, while, if the course of the exhalations that go to form the hair lies straight, it renders the hair stiff and straight.