Thomas Aquinas

“ If fire and air, whose action is of greater power, predominated also in quantity in the human body, they would entirely draw the rest into themselves, and there would be no equality in the mingling, such as is required in the composition of man, for the sense of touch, which is the foundation of the other senses. ”

“ Now God, though He is absolutely immaterial, can alone by His own power produce matter by creation: wherefore He alone can produce a form in matter, without the aid of any preceding material form. For this reason the angels cannot transform a body except by making use of something in the nature of a seed, as Augustine says (De Trin. iii, 19) . Therefore as no pre-existing body has been formed whereby another body of the same species could be generated, the first human body was of necessity made immediately by God. ”

“ For he does not possess a natural knowledge of all natural things, but is in a manner composed of all things, since he has in himself a rational soul of the genus of spiritual substances, and in likeness to the heavenly bodies he is removed from contraries by an equable temperament. As to the elements, he has them in their very substance, yet in such a way that the higher elements, fire and air, predominate in him by their power; for life is mostly found where there is heat, which is from fire ”

“ An upright stature was becoming to man for four reasons. First, because the senses are given to man, not only for the purpose of procuring the necessaries of life, which they are bestowed on other animals, but also for the purpose of knowledge. Hence, whereas the other animals take delight in the objects of the senses only as ordered to food and sex, man alone takes pleasure in the beauty of sensible objects for its own sake. ”

“ This perfection is bestowed on the angels, inasmuch as all things which are produced by God in nature through various forms come under their knowledge. But on man this perfection is bestowed in an inferior way. ”

“ In the slime of the earth are earth, and water binding the earth together. Of the other elements, Scripture makes no mention, because they are less in quantity in the human body, as we have said; and because also in the account of the Creation no mention is made of fire and air, which are not perceived by senses of uncultured men such as those to whom the Scripture was immediately addressed. ”

“ The power of the Divine Creator was manifested in man's body when its matter was produced by creation. But it was fitting that the human body should be made of the four elements, that man might have something in common with the inferior bodies, as being something between spiritual and corporeal substances.
Reply to Objection 2: Although the heavenly body is in itself nobler than the earthly body, yet for the acts of the rational soul the heavenly body is less adapted. ”

“ Although the angels are the ministers of God, as regards what He does in bodies, yet God does something in bodies beyond the angels' power, as, for instance, raising the dead, or giving sight to the blind: and by this power He formed the body of the first man from the slime of the earth. ”

“ The same reason suffices to explain why some animals are more rapid in movement than man, since this excellence of speed is inconsistent with the equability of the human temperament.
Reply to Objection 2: Horns and claws, which are the weapons of some animals, and toughness of hide and quantity of hair or feathers, which are the clothing of animals, are signs of an abundance of the earthly element; which does not agree with the equability and softness of the human temperament. Therefore such things do not suit the nature of man. ”

“ I answer that, All natural things were produced by the Divine art, and so may be called God's works of art. Now every artist intends to give to his work the best disposition; not absolutely the best, but the best as regards the proposed end; and even if this entails some defect, the artist cares not: thus, for instance, when man makes himself a saw for the purpose of cutting, he makes it of iron, which is suitable for the object in view ”

“ Further, perfect is what lacks nothing. But the human body lacks more than the body of other animals, for these are provided with covering and natural arms of defense, in which man is lacking. Therefore the human body is very imperfectly disposed.
Objection 3: Further, man is more distant from plants than he is from the brutes. But plants are erect in stature, while brutes are prone in stature. Therefore man should not be of erect stature. ”

“ But the power of heavenly bodies suffices for the production of some imperfect animals from properly disposed matter: for it is clear that more conditions are required to produce a perfect than an imperfect thing. ”

“ To remove the difficulty some have said that the words, "God made man," must be understood of the production of the body with the soul; and that the subsequent words, "and He breathed into his face the breath of life," should be understood of the Holy Ghost ”

“ I answer that, The first formation of the human body could not be by the instrumentality of any created power, but was immediately from God. Some, indeed, supposed that the forms which are in corporeal matter are derived from some immaterial forms ”

“ But by a kind of necessity, man falls short of the other animals in some of the exterior senses; thus of all animals he has the least sense of smell. For man needs the largest brain as compared to the body ”

“ Secondly, for the greater freedom of the acts of the interior powers; the brain, wherein these actions are, in a way, performed, not being low down, but lifted up above other parts of the body. Thirdly, because if man's stature were prone to the ground he would need to use his hands as fore-feet; and thus their utility for other purposes would cease. Fourthly, because if man's stature were prone to the ground, and he used his hands as fore-feet, he would be obliged to take hold of his food with his mouth. ”

“ So that size of the brain, by reason of its humidity, is an impediment to the smell, which requires dryness. In the same way, we may suggest a reason why some animals have a keener sight, and a more acute hearing than man; namely, on account of a hindrance to his senses arising necessarily from the perfect equability of his temperament. ”