(c) If a passion is persistent, it may be diverted to some lawful object vividly represented and held in the imagination and thoughts. Examples. Those who are inclined to love immoderately the world or the things that are in the world should direct their love to divine goodness. Those who are inclined to be too fearful of men should think how much more God is to be feared.
Question II
GOOD AND BAD HABITS
132. Having considered human acts and the passions, we now pass to a consideration of the principles from which acts proceed proximately. These principles are, first, the faculties, powers or forces of the soul (such as the intellect, will, sense, appetite, and vegetative powers); and, secondly, the habits which permanently modify the faculties. For some faculties may be turned in various directions, either favorably or unfavorably, as regards their ends, and it is the stable bent given to a faculty that is called a habit. Thus, the intellect may be directed towards its end, which is truth, by the habit of knowledge; or away from that end by the habit of ignorance. Likewise, the will may be directed towards or away from its end, which is good, by virtue or vice. The faculties are treated in Psychology, but the habits, since they turn the faculties towards good or evil, must be considered in Moral Theology, as well as in philosophy.
Art. 1: HABITS IN GENERAL
(_Summa Theologica_, I-II, qq. 49-54.)
133. Definition.—A habit is a perfect and stable quality by which a being is well- or ill-affected in itself, or with regard to its motions. It differs from mere disposition or tendency, which is an imperfect and transitory quality. Thus, a sallow complexion is a habit; a blush, a disposition.
134. Division.—Habits are variously divided, as follows:
(a) From the viewpoint of their subject, they are either entitative or operative, according as they affect directly the nature or the powers of a being. Thus, in the soul there are the entitative habit of sanctifying grace and operative habits like science and virtue; while in the body are entitative habits of health, beauty, etc.
(b) From the viewpoint of their object, habits are good (i.e., virtues) or evil (i.e., vices);
(c) From the viewpoint of their cause, habits are infused or acquired, according as they are supernaturally produced by God, or are naturally obtained by man through repeated acts, or result from nature without repeated acts. Faith in a baptized infant is an infused habit; knowledge obtained through study is an acquired habit; the perception that the first principles of truth are to be granted is natural.