(c) After the fact, absolution given to one who was in substantial ignorance of the Trinity and Incarnation, may be regarded as valid, since the opinion that explicit knowledge of these mysteries is not a necessary means, is at least probable. Hence, according to the principles of Probabilism a penitent who made confessions While ignorant of those two mysteries is not obliged to repeat his confessions, since he has probably satisfied his obligation.
793. In the following cases (which would be rare, it seems) Baptism or absolution cannot be administered, even to the dying who are unable to receive instruction: (a) when it is certain that the dying person is substantially ignorant about the existence of God, the Author of grace and glory; (b) when it is certain that the dying person is substantially ignorant of the Trinity and Incarnation through his own fault, and is unwilling to hear about them.
794. Practical rules for granting the Sacraments in case of doubt or urgency to those who seem to be indisposed on account of substantial ignorance are the following:
(a) In danger of death, when instruction is out of the question, if there is doubt about his ignorance, the dying person should be given the benefit of the doubt.
(b) In danger of death, and when instruction is impossible, if there is doubt about the mental ability of the dying person and his obligation to have explicit faith, he should receive the benefit of the doubt.
(c) In danger of death or other urgent necessity, when instruction is needed and possible, it should be given briefly as follows: “Let us say the act of faith: I believe in one God, the Father, Son and Holy Ghost, who has promised to take to Himself after this life all those that love Him, and who punishes the wicked. I hope to have the happiness of being received into His companionship through the help of Jesus Christ, the Son of God, who became man and died for my salvation.” This or a similar instruction should be given by the priest or lay person present in baptizing an adult who is about to die. When there is not immediate danger of death, a person who is baptized or absolved after short instruction on account of emergency, should be admonished of the duty of receiving fuller instruction later on.
795. Faith is the free exercise of the free assent of the intellect to the unseen, an acceptance of obligations and tasks hard to human nature. It is, therefore, an act of homage to the authority of God, and is meritorious: “By faith the ancient patriarchs obtained the promises” (Heb., xi. 33). Is the freedom and meritoriousness of this act of faith lessened if one seeks for other arguments than the authority of God in giving one’s assent to revelation? (a) The merit of the act of faith is not lessened, when one seeks human arguments for the assent of credibility which is prior to the assent of faith; for it is only the part of prudence that one should first assure oneself of the fact that a revelation has been made, before one assents on faith to the doctrines contained in that revelation. Now, the arguments by which one assures oneself of the fact of a revelation are human arguments, such as proofs that revelation is possible and suitable, that there are miracles, prophecies and other signs to guarantee the divine mission of those who delivered the revelation, etc.
(b) The merit of the act of faith is not lessened if one seeks human arguments for the preambles of faith, that is, for those divine truths that can be established by natural reason (such as the existence of God, His infinite knowledge and truthfulness). The person who demonstrates these preambles by philosophical proofs, has knowledge, not belief, about them; but the merit of faith is not lost, if, while knowing these truths, he remains willing to accept them on the authority of revelation.
(c) The merit of faith is not lessened, if one seeks human arguments for the mysteries of faith, that is, for those truths of revelation that are above human reason (such as the Trinity and the Incarnation), provided these arguments are sought not for the demonstration, but for the confirmation or defense of dogma. Nay, a person ought, in so far as he is able, to use his reason in the service of faith, and to do so is a sign, not of little, but of great faith. “Be ready always,” says St. Peter (I Peter, iii. 15), “to satisfy everyone that asketh you a reason of that hope which is in you.” And St. Anselm says: “It appears to me a sign of carelessness, if, having been confirmed in the faith, we do not take pains to understand what we believe.” St. Thomas writes: “When a man is willing to believe, he loves the truth, meditates upon it, and takes to heart whatever reasons he can find in support thereof; and with regard to this, human reason does not exclude the merit of faith, but is a sign of greater merit.”
(d) The merit of faith is lessened if one seeks human arguments as the formal object, that is, as the motive on which faith is grounded; for then one does not wish to believe, or to believe so readily, on the word of God alone, but feels one must call in other testimony to support it.