Cicero's Tusculan Disputations / Also, Treatises On The Nature Of The Gods, And On The Commonwealth

by Marcus Tullius Cicero

LVII. What artificer but nature, whose direction is incomparable, could have exhibited so much ingenuity in the formation of the senses? In the first place, she has covered and invested the eyes with the finest membranes, which she hath made transparent, that we may see through 310them, and firm in their texture, to preserve the eyes. She has made them slippery and movable, that they might avoid what would offend them, and easily direct the sight wherever they will. The actual organ of sight, which is called the pupil, is so small that it can easily shun whatever might be hurtful to it. The eyelids, which are their coverings, are soft and smooth, that they may not injure the eyes; and are made to shut at the apprehension of any accident, or to open at pleasure; and these movements nature has ordained to be made in an instant: they are fortified with a sort of palisade of hairs, to keep off what may be noxious to them when open, and to be a fence to their repose when sleep closes them, and allows them to rest as if they were wrapped up in a case. Besides, they are commodiously hidden and defended by eminences on every side; for on the upper part the eyebrows turn aside the perspiration which falls from the head and forehead; the cheeks beneath rise a little, so as to protect them on the lower side; and the nose is placed between them as a wall of separation.

The hearing is always open, for that is a sense of which we are in need even while we are sleeping; and the moment that any sound is admitted by it we are awakened even from sleep. It has a winding passage, lest anything should slip into it, as it might if it were straight and simple. Nature also hath taken the same precaution in making there a viscous humor, that if any little creatures should endeavor to creep in, they might stick in it as in bird-lime. The ears (by which we mean the outward part) are made prominent, to cover and preserve the hearing, lest the sound should be dissipated and escape before the sense is affected. Their entrances are hard and horny, and their form winding, because bodies of this kind better return and increase the sound. This appears in the harp, lute, or horn;[²³⁷] and from all tortuous and enclosed places sounds are returned stronger.

The nostrils, in like manner, are ever open, because we have a continual use for them; and their entrances also are rather narrow, lest anything noxious should enter 311them; and they have always a humidity necessary for the repelling dust and many other extraneous bodies. The taste, having the mouth for an enclosure, is admirably situated, both in regard to the use we make of it and to its security.

LVIII. Besides, every human sense is much more exquisite than those of brutes; for our eyes, in those arts which come under their judgment, distinguish with great nicety; as in painting, sculpture, engraving, and in the gesture and motion of bodies. They understand the beauty, proportion, and, as I may so term it, the becomingness of colors and figures; they distinguish things of greater importance, even virtues and vices; they know whether a man is angry or calm, cheerful or sad, courageous or cowardly, bold or timorous.

The judgment of the ears is not less admirably and scientifically contrived with regard to vocal and instrumental music. They distinguish the variety of sounds, the measure, the stops, the different sorts of voices, the treble and the base, the soft and the harsh, the sharp and the flat, of which human ears only are capable to judge. There is likewise great judgment in the smell, the taste, and the touch; to indulge and gratify which senses more arts have been invented than I could wish: it is apparent to what excess we have arrived in the composition of our perfumes, the preparation of our food, and the enjoyment of corporeal pleasures.

LIX. Again, he who does not perceive the soul and mind of man, his reason, prudence, and discernment, to be the work of a divine providence, seems himself to be destitute of those faculties. While I am on this subject, Cotta, I wish I had your eloquence: how would you illustrate so fine a subject! You would show the great extent of the understanding; how we collect our ideas, and join those which follow to those which precede; establish principles, draw consequences, define things separately, and comprehend them with accuracy; from whence you demonstrate how great is the power of intelligence and knowledge, which is such that even God himself has no qualities more admirable. How valuable (though you Academics despise and even deny that we have it) is our 312knowledge of exterior objects, from the perception of the senses joined to the application of the mind; by which we see in what relation one thing stands to another, and by the aid of which we have invented those arts which are necessary for the support and pleasure of life. How charming is eloquence! How divine that mistress of the universe, as you call it! It teaches us what we were ignorant of, and makes us capable of teaching what we have learned. By this we exhort others; by this we persuade them; by this we comfort the afflicted; by this we deliver the affrighted from their fear; by this we moderate excessive joy; by this we assuage the passions of lust and anger. This it is which bound men by the chains of right and law, formed the bonds of civil society, and made us quit a wild and savage life.

And it will appear incredible, unless you carefully observe the facts, how complete the work of nature is in giving us the use of speech; for, first of all, there is an artery from the lungs to the bottom of the mouth, through which the voice, having its original principle in the mind, is transmitted. Then the tongue is placed in the mouth, bounded by the teeth. It softens and modulates the voice, which would otherwise be confusedly uttered; and, by pushing it to the teeth and other parts of the mouth, makes the sound distinct and articulate. We Stoics, therefore, compare the tongue to the bow of an instrument, the teeth to the strings, and the nostrils to the sounding-board.

LX. But how commodious are the hands which nature has given to man, and how beautifully do they minister to many arts! For, such is the flexibility of the joints, that our fingers are closed and opened without any difficulty. With their help, the hand is formed for painting, carving, and engraving; for playing on stringed instruments, and on the pipe. These are matters of pleasure. There are also works of necessity, such as tilling the ground, building houses, making cloth and habits, and working in brass and iron. It is the business of the mind to invent, the senses to perceive, and the hands to execute; so that if we have buildings, if we are clothed, if we live in safety, if we have cities, walls, habitations, and temples, it is to the hands we owe them.

313By our labor, that is, by our hands, variety and plenty of food are provided; for, without culture, many fruits, which serve either for present or future consumption, would not be produced; besides, we feed on flesh, fish, and fowl, catching some, and bringing up others. We subdue four-footed beasts for our carriage, whose speed and strength supply our slowness and inability. On some we put burdens, on others yokes. We convert the sagacity of the elephant and the quick scent of the dog to our own advantage. Out of the caverns of the earth we dig iron, a thing entirely necessary for the cultivation of the ground. We discover the hidden veins of copper, silver, and gold, advantageous for our use and beautiful as ornaments. We cut down trees, and use every kind of wild and cultivated timber, not only to make fire to warm us and dress our meat, but also for building, that we may have houses to defend us from the heat and cold. With timber likewise we build ships, which bring us from all parts every commodity of life. We are the only animals who, from our knowledge of navigation, can manage what nature has made the most violent—the sea and the winds. Thus we obtain from the ocean great numbers of profitable things. We are the absolute masters of what the earth produces. We enjoy the mountains and the plains. The rivers and the lakes are ours. We sow the seed, and plant the trees. We fertilize the earth by overflowing it. We stop, direct, and turn the rivers: in short, by our hands we endeavor, by our various operations in this world, to make, as it were, another nature.

LXI. But what shall I say of human reason? Has it not even entered the heavens? Man alone of all animals has observed the courses of the stars, their risings and settings. By man the day, the month, the year, is determined. He foresees the eclipses of the sun and moon, and foretells them to futurity, marking their greatness, duration, and precise time. >From the contemplation of these things the mind extracts the knowledge of the Gods—a knowledge which produces piety, with which is connected justice, and all the other virtues; from which arises a life of felicity, inferior to that of the Gods in no single particular, except in immortality, which is not absolutely necessary 314to happy living. In explaining these things, I think that I have sufficiently demonstrated the superiority of man to other animated beings; from whence we should infer that neither the form and position of his limbs nor that strength of mind and understanding could possibly be the effect of chance.