LVI. To this skill of nature, and this care of providence, so diligent and so ingenious, many reflections may be added, which show what valuable things the Deity has bestowed on man. He has made us of a stature tall and upright, in order that we might behold the heavens, and so arrive at the knowledge of the Gods; for men are not simply to dwell here as inhabitants of the earth, but to be, as it were, spectators of the heavens and the stars, which is a privilege not granted to any other kind of animated beings. The senses, which are the interpreters and messengers of things, are placed in the head, as in a tower, and wonderfully situated for their proper uses; for the eyes, being in the highest part, have the office of sentinels, in discovering to us objects; and the ears are conveniently placed in a high part of the person, being appointed to receive sound, which naturally ascends. The nostrils have the like situation, because all scent likewise ascends; and they have, with great reason, a near vicinity to the mouth, because they assist us in judging of meat and drink. The taste, which is to distinguish the quality of what we take; is in that part of the mouth where nature has laid open a passage for what we eat and drink. But the touch is equally diffused through the whole body, that we may not receive any blows, or the too rigid attacks of cold and heat, without feeling them. And as in building the architect averts from the eyes and nose of the master those things which must necessarily be offensive, so has nature removed far from our senses what is of the same kind in the human body.
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 them, 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.