346. (vi) There are two forms into which operation by influx takes place, the vegetable and the animal form. That two universal forms only are produced from the earth is known from the two kingdoms of nature, which are called the animal and vegetable kingdoms. And all the things of either kingdom have many features in common. Thus the subjects of the animal kingdom have organs of sense and organs of motion, members and viscera also, which are actuated by brains, heart and lungs; while the subjects of the vegetable kingdom send a root into the ground and bring forth stem, branches, leaves, flowers, fruit and seeds. Both kingdoms, animal and vegetable alike, as to productions into their forms, derive their origin by spiritual influx and operation from the Sun of heaven where the Lord is, and not from the influx and operation of nature from her sun, except the fixation of them, as was said above. All animals, great and small, derive their origin from the spiritual in the lowest degree, which is called natural, and man alone from all the degrees, of which there are three, called celestial, spiritual, and natural. As each degree of height, or discrete degree, decreases from its perfection to its imperfection by continuity, as light does to shade, so also do animals; wherefore there are perfect, less perfect, and imperfect animals. The perfect animals are elephants, camels, horses, mules, oxen, sheep, goats, and others, either of the herd or flock. The less perfect are birds. The imperfect are fish and shell fish; these, since they are the lowest of their degree, are, as it were, in shade, while the former are in light. Yet since they live solely from the lowest spiritual degree, which is called the natural, animals cannot look elsewhere than towards the earth and the food there, and to their own kind for the sake of propagation. The soul of all these is natural affection and appetite. It is the same with the subjects of the vegetable kingdom, which include the perfect, less perfect, and imperfect. The perfect are fruit trees, the less perfect are grape vines and shrubs, and the imperfect are grasses. From the spiritual, which is their origin, vegetables derive that they are uses, and animals derive that they are affections and appetites, as has been said.