X. (24) “And all the grass of the field,” he proceeds, “before it sprang up.” That is to say, before the particular things perceptible by the external senses sprang up, there existed the generic something perceptible by the external senses through the fore-knowledge of the Creator, which he again called “the universe.” And very naturally he likened the things perceptible by the external senses to grass. For as grass is the food of irrational animals, so also that which is perceptible by the external senses is assigned to the irrational portion of the soul. For why, when he has previously mentioned “the green herb of the field,” does he add also “and all the grass,” as if grass were not green at all? But the truth is, that by the green herb of the field, he means that which is perceptible by the intellect only, the budding forth of the mind. But grass means that which is perceptible by the external senses, that being likewise the produce of the irrational part of the soul. (25) “For God did not rain upon the earth, and man did not exist to cultivate the earth,” speaking in the strictest accordance with natural philosophy. For if God did not shed the perceptions of things subject to them, like rain upon the senses, in that case the mind too would not labour nor employ itself about sensation. For he himself would be unable to effect anything by himself, unless he were to pour forth, like rain or dew, colours upon the sight, and sounds upon the hearing, and flavour on the tastes, and on all the other senses, the things proper to produce the requisite effects. (26) But when God begins to rain sensation on the things perceptible by the external senses, then also the mind is perceived to act like the cultivator of fertile soil. But the idea of sensation, which he, speaking figuratively, has called the earth, is in no need of nourishment. But the nourishment of the senses, are the particular objects perceptible by the external senses; and these objects are bodies. But an idea is a thing different from bodies. Before, therefore, there existed any individual compound substances, God did not rain upon that idea of sensation to which he gave the name of the earth. And that means that he did not furnish it with any nourishment; for, indeed, it had altogether no need of any object perceptible by the external senses. (27) But when Moses says, “And man did not exist to cultivate the earth,” that means that the idea of intellect did not labour upon the idea of the sensations. For my intellect and yours work up the sensations by means of things perceptible by the external senses: but the idea of mind as must be the case while there is no individual body connected with it does not work upon the idea of sensation. For if it did so work, it would of course work by means of objects, perceptible by the external senses. But there is no such object in ideas.