Most people can be classed under the one or the other of these, and the arrangement is not useless in self-culture, for it will furnish hints as to the manner of training required to correct unwholesome mental tendencies. The temperament toward which they should all be modified is not included in the list. It is the _cheerful_ temperament, that which is lighted by the rays of reasonable hope and a confidence in one’s own powers grounded on a knowledge of their strength. Cheerfulness, however, is a coy favorite, and is not to be had for the asking. It is a condition of mind which a man cannot think himself into, nor reason himself into, nor directly acquire by an effort of the will. No man can seat himself in his chair and say to himself,――“Go to! I will be merry!” It can in part be secured by a skillful disposition of the emotions at our command; but it is, in the main, the mental result of physical processes, and the profitable study of it must begin with these. So very physical is it, that physiologists have undertaken to locate its exact seat in the human body. They place it in the great ganglia of the sympathetic nervous system, near the stomach and the heart, where also is located the seat of the sense of general miserableness that the French call _malaise_. No one feels happy in his head or in his foot; but we do speak of being light of heart, as well as heart-heavy and heart-broken. Those savage tribes who believe that the soul dwells in the pit of the stomach are not the worst physiologists. The mental condition in certain diseases show how correct this is. Those which directly involve the stomach, the liver, the heart, and the intestinal canal are always associated with undue depression of spirits; while those which are confined to the lungs or the brain, though of the most fatal gravity, may be connected with undiminished cheerfulness. The _spes phthisica_, the hopefulness of the consumptive, is proverbial among physicians, but as deceptive to them as to others. A friend of mine, a medical man, who had fought this disease for three years, wrote me three days before his death, sketching a series of literary schemes which he had decided to undertake! Another malady of similar character is a variety of paralysis, always fatal, not uncommon among overworked business men of middle life. The patient will never acknowledge that he is ill or feels badly, and when so paralyzed that he cannot rise from his couch will insist that he is in splendid health and is merely lazy! How different from the dyspeptic, always magnifying his symptoms; from the hypochondriac with engorged liver; or from the sufferer from heart disease, with his long and inexplicable spells of low spirits!