(i) From feeling itself; since, when a man exerts his mind to think, he perceives that he thinks in the brain. He draws in, as it were, the sight of the eye, and knits his brows, and feels that the investigation is within, mostly in the forehead and somewhat above it. (2) From the formation of man in the womb; since the brain or head comes first and for quite a long time continues larger than the body. (3) Since the head is above and the body below; and it is according to order that the higher acts upon the lower, and not the reverse. (4) Since, with the brain injured, either in the womb, or by a wound, or by disease, or by excessive strain, thought is impaired, and sometimes the mind becomes deranged. (5) Since all the body's outward senses, namely, sight, hearing, smell and taste, together with the general sense of touch, and even speech, are in the front part of the head, which is called the face, and communicate immediately by means of fibres with the brains, and derive from them their sensitive and active life. (6) Hence it is that affections which are of love are portrayed in the face, and thoughts which are of wisdom are reflected in the eyes. (7) Anatomy also teaches that all fibres descend from the brains through the neck into the body and that none ascend from the body through the neck into the brains. And where the fibres are in their beginnings and first things, there life is in its beginnings and first things. Who dares to deny that life has its origin where the fibres have their origin? (8) Ask anyone of common perception "Where is thought?" or "Where do you think?" and he will reply, "In the head." Then ask someone who has assigned the seat of the soul to a particular gland or to the heart, or elsewhere, "Where are affection and its thought in their first beginning? Are they not in the brain?" and he will answer, "No," or that he does not know. The reason for this ignorance you may see above (n. 361).