177. Though full advertence is required for a mortal sin, it is not required that this advertence be the most perfect. (a) It is not necessary that the advertence be preceded by long deliberation, for advertence can be full even when the consideration is only momentary, (b) It is not necessary that advertence be continued during the commission of a sin, for what follows is foreseen if adverted to at the beginning. (c) It is not necessary that advertence to the malice of the sin be clear or exact. One who perceives that there is some special malice in robbing a church, even though he does not understand just what the malice is, has sufficient advertence to become guilty of sacrilege. Likewise, one who has doubts as to whether a certain sin is mortal, or who suspects that it is mortal, has sufficient advertence for grave guilt if he commits that sin. (d) It is not necessary that advertence to the malice of the sin be reflex (i.e., that one advert to the fact that one is conscious of the gravity of the sin); for to will the malice, it suffices that one be conscious of the malice. (e) It is not necessary that advertence to the malice of the sin be explicit (i.e., that one have in mind the precise nature of sin as an offense against God, which produces a stain on the soul and incurs the debt of punishment); for to will evil and its gravity, it suffices that one perceive the evil and its gravity, even though one does not analyze the meaning or seek out the ultimate reasons. 178. The third condition required that a sin be mortal is that full consent of the will be given it, for no one separates him self from God except through his own free choice. (a) Consent is not full, when there has not been full advertence, or when an act has been done under violent compulsion; (b) consent is full when there has been full advertence and no forceful compulsion (see above on Violence, 52). 179. Indications that consent was not full are: (a) if before the sin the person was of tender conscience and had habitually a horror of grave sin; (b) if at the time of the sin the person recoiled from the sinful suggestion--e.g., if he had a hatred for it as soon as it was fully perceived, or if he was saddened at the temptation, or if he kept from an external act that could have been easily performed; (c) if after the sin the person was conscientious, and yet had doubts as to whether consent was given. 180. Venial Sin.--A sin is venial, or more easily pardonable, when by it one turns inordinately towards some created good, not so, however, as to forsake God as one’s Last End or to prefer self-will to the divine friendship. 181. The first condition required that a sin be called venial is that its matter be light, either in reality, or in the invincible belief of him who commits it. The criteria by which we may know what matter is light are authority and right reason (see above, 171).