(a) implicit or explicit, according as the dissent is expressed in what contains it, or is expressed in itself. Examples: Contempt of a temptation or displeasure over its presence is implicit resistance, while the resolve never to yield to it is explicit resistance; (b) internal or external, according as it remains in the will, or is also exercised by the other powers. Examples: Displeasure over an uncharitable thought is internal resistance, while the reading of a book to divert the mind from the thought is external resistance; (c) indirect or direct, according as the means employed to drive away a temptation are flight or attack. Examples: One who is disturbed by thoughts of hatred, resists them indirectly if he goes to the opera in order to be calmed by music, while he resists them directly, if he reads prayerfully I Cor. xiii, in order to become more charitable; (d) virtual or actual, according as the act of dissent made, and not retracted, is adverted to or not. Examples: If a man rejects a temptation of envy as soon as he notices it, and repeats this act of rejection until the temptation has disappeared, his resistance is actual; if he rejects the temptation once for all as soon as it appears, but is not able to think of this purpose at each instant, his resistance was actual at the beginning, but virtual afterwards. 256. General rules regarding resistance to temptation: (a) it is a grave sin not to resist temptation, when the sin suggested is grave, the danger of consent serious, and the negligence considerable; otherwise the sin is venial; (b) negligence is considerable when the resistance used is not at all in proportion to the temptation. Example: If a man were suddenly to advert to the fact that a shrewd plan he had decided on was gravely unjust, he would be seriously negligent if he put off recalling the decision till he had dwelt more fully on its appealing features. 257. The kind of resistance to be opposed to temptation depends on the character and urgency of the temptation and the disposition of the person tempted. (a) Generally speaking, the more serious the temptation, the stronger should be the resistance. Example: One who knows from experience that temptations to hatred overcome him, if he uses only internal resistance, should make use of external resistance also. (b) In those cases in which the violence of the temptation increases in proportion to the strength of the resistance, it is better that the resistance be internal, indirect, etc. Examples: Temptations against faith are often overcome more readily by turning the mind away from the doubts suggested to other matters. Temptations that last a long time may be conquered more easily by despising them than by worrying about them and renewing protest after protest. The same is true as regards temptations against purity.