As the faculty of Conscientiousness gives us the control of our impulses and selfish or sensual inclinations to qualify for the performance of duty, its antagonist gives the vigor to the sensual, violent and selfish passions, and prompts to the utter disregard of duty. The one being vertically above the centre of the brain, the other must be vertically below it; one being on the upper the other must be on the basilar surface. This brings it below the margin of the middle lobe, which is above the cavity of the ear. Hence through the cavity of the ear we reach underneath the basis of the middle lobe, where it rests on the petrous ridge of the temporal bone, and the external marking would correspond to the cavity of the ear or meatus auditorius. For this organ and faculty, the name which would express its unrestrained action is Baseness, as it would lead to the commission of many crimes and the violation of all honesty and justice. For its moderate and restrained activity, the term Selfishness would be sufficient as it induces us to heed our selfish appetites, interests, and passions, in opposition to the voice of duty. Its more normal activity is to invigorate our animal life generally and prevent us from going too far in the line of duty, patience, forbearance and benevolence. Let it be marked Ba. Its position will be recognized on the vertical line between the frontal and occipital, as it is not an element of energy and success, nor of debility, but simply an element of debasing animalism, which is not destitute of force.
There are in the human constitution the opposite elements of untiring energy or industry, and of indolent relaxation. To the former we must give an exalted position, as it is the sustaining power of all the virtues; and it must evidently be farther back than conscientiousness as it is of a more vigorous character. It is favorable to health and therefore near that organ, and being free from selfishness it is not far behind Conscientiousness. The letters En. show its location. Energy being thus behind Conscientiousness, its antagonist Relaxation, the source of indolence, must be anterior to Baseness, where we locate the letters Re.
The opposite elements of Serenity or Patience, and Irritability are easily located; the former is obviously entitled to a high position. From its quiet nature it cannot be assigned to the occiput, and from its steady, unyielding and supporting strength, it cannot be assigned to the frontal region. It must, therefore, be in the middle superior region, where the letters Pa. locate it. Irritability must be on the median line of the basilar range (and antagonizes Patience on the middle line above), but not as low as Baseness, for one may be honorable though irritable and high-tempered, but such temper is not compatible with very strict conscientiousness.