(b) By reason of its manner, the conflict is either removal of the temptation (i.e., cessation from an act which produces the temptation) or resistance, passive or active. Passive resistance is the suspension of activity relative to the temptation till it ends of itself, as when internally the will neither consents nor dissents, or externally nothing is done for or against the temptation. Active resistance is positive opposition offered to temptation. It is made in two ways: first, by way of flight, as when internally the mind turns away to other thoughts (e.g., absorbing studies, meditation on the passion of Christ), or the will devotes itself to other subjects of resolve (e.g., acts of love of God or of purity), or externally the body is removed or freed from conditions that excite temptation; secondly, by way of attack, as when internally the mind turns against the temptation (e.g., thinking of its dangers, calling on God to drive it away), or the will rejects the temptation (e.g., by despising it, by expressing dislike, disapproval and unwillingness, by firmly resolving not to yield, by deciding on measures against the passion), or when externally the body is subjected to pain or mortification.
(c) By reason of its circumstances, resistance to temptation is either prolonged, as when the act by which the will resists is of considerable duration or is renewed at frequent intervals, or is brief, as when the act of rejection is momentary and is not repeated.
2499. What Opposition to Temptation Is Sufficient?—Opposition to temptations of the flesh must be sufficient to remove the temptation, when the temptation is due to the continuance of one’s own sinful or unjustified act; for one is obliged to cease from sin or the unreasonable. This happens (a) when the temptation is directly voluntary—for example, one who wished to experience temptation and therefore reads a very seductive book must give over this reading; or (b) when the temptation is not directly voluntary and is without sufficient reason—for example, one who experiences carnal temptation due to a book which he reads from idle curiosity must desist from the book. But one is not bound to omit or interrupt necessary or useful acts, such as rest and sleep, prayer and charity; consent should be denied the evil, but the good should be continued.
2500. Insufficient, Harmful and Unnecessary Opposition.—In other cases opposition to temptations of the flesh must be such as is sufficient to keep one from consent, that is, to protect one against the proximate danger of sin.
(a) Hence, that resistance is insufficient which does not strengthen the will. It seems that passive will-resistance is of this kind, since it is most difficult for the will to remain inactive in the presence of carnal stimulation or motions of the sensible appetites without being moved by the evil suggestion. In external resistance, however, passive opposition suffices when it alone is feasible, as when temptation grows out of necessary work, or rest that cannot be discontinued or interrupted by active resistance, provided the will registers internally its displeasure or disapproval; but external passivity is not permissible when the will needs the help of external resistance, as in the case of vehement and prolonged temptations.
(b) That resistance is harmful which strengthens the temptation. Hence, resistance by direct attack or by formal rejection is oftentimes to be omitted in favor of resistance by flight or by contempt; for it is a common teaching of the Fathers and Doctors confirmed by experience that dwelling on reasons and means of repelling passion often adds to its strength, and that resolving mightily and expressly to crush a weak and passing temptation often serves only to give it a longer life. It is better to brush a mosquito away than to risk one’s neck by chasing it up and down stairs.
(c) That resistance is unnecessary which demands a physical or moral impossibility. Thus, a prolonged act of resistance or one repeated at intervals of a few minutes, or a resistance that includes extreme corporal austerities, is not required in ordinary cases at least. When a temptation is unusually vehement or is due to one’s own fault, there should be proportionately greater resistance to offset the greater danger; but when a temptation is only moderately dangerous, it suffices to reject it firmly but briefly and to repeat this when there arises a new crisis or danger and the renewal of resistance is useful.
2501. Weapons against Carnal Temptations.—The most powerful weapons against carnal temptations are spiritual ones, and of these the most necessary is grace, which should be asked in prayer (Wis., viii. 21), especially through the intercession of the Blessed Virgin Mary (see Pius XII, _Sacra Virginitas_, March 25, 1954). But corporal means, chiefly of a preventive kind, should not be neglected.
(a) Physical measures are the observance of what are now often spoken of as sex hygiene for normal and sex therapeutics for abnormal cases. Special health rules whose observance conduces to good morals are especially the cultivation of habits of bodily cleanliness, of hard mental and physical work, of vigorous exercise and the avoidance of unhealthful habits (such as constipation, drug or spirit stimulation), unsuitable clothing or sleeping conditions. Surgical or medical treatment for structural abnormalities or for mental or bodily diseases that react unfavorably on sex life requires the service of a conscientious and competent physician.
(b) Religious measures are various forms of corporal mortification, such as custody of the eyes and other senses, deprivation in food (fasting and abstinence) and sleep (vigils, night watches), afflictive penances through the use of hairshirts, painful girdles, scourges or disciplines. But austerities must be suited to the health, age, condition, duties and other circumstances of the person who practises them, and should not be used without the consent of one’s confessor or spiritual director.