346. (6) There are two forms into which the operation by influx takes place, the vegetable and the animal form. That there are only two universal forms produced out of the earth is known from the two kingdoms of nature, called the animal and the vegetable kingdoms, also that all the subjects of either kingdom possess many things in common. Thus the subjects of the animal kingdom have organs of sense and organs of motion and members and viscera that are actuated by brains, hearts, and lungs. So the subjects of the vegetable kingdom send down a root into the ground, and bring forth stem, branches, leaves, flowers, fruits, and seeds. Both the animal and the vegetable kingdoms, as regards the production of their forms, derive their origin from spiritual influx and operation out of the sun of heaven where the Lord is, and not from the influx and operation of nature out of her sun; from this they derive nothing except their fixation, as was said above. All animals, great and small, derive their origin from the spiritual in the outmost degree, which is called the natural; man alone from all three degrees, called the celestial, spiritual, and natural. As each degree of height or discrete degree decreases from its perfection to its imperfection, as light to shade, by continuity, so do animals; there are therefore perfect, less perfect, and imperfect animals. The perfect animals are elephants, camels, horses, mules, oxen, sheep, goats, and others which are of the herd or the flock; the less perfect are birds; and the imperfect are fish and shell-fish; these, as being the lowest of that degree, are as it were in shade, while the former are in light. Yet animals, since they live only from the lowest spiritual degree, which is called the natural, can look nowhere else than towards the earth and to food there, and to their own kind for the sake of propagation; the soul of all these is natural affection and appetite. The subjects of the vegetable kingdom comprise, in like manner, the perfect, less perfect, and imperfect; the perfect are fruit trees, the less perfect are vines and shrubs, and the imperfect are grasses. But plants derive from the spiritual out of which they spring that they are uses, while animals derive from the spiritual out of which they spring that they are affections and appetites, as was shown above.