Section — Wouters, Manual of Moral Theology
Section II. On the Requisites for Licit Reception
In little children and the perpetually insane no disposition is required. In adults these things are required:
I. They must have the disposition by which they become proximately capable of the effect to which the sacrament is of itself ordered. Hence:
For the sacraments of the dead, that is, for Baptism and Penance, besides acts, at least implicit, of faith and hope, at least attrition is required.1 That attrition suffices is clear from the fact that those sacraments are of themselves ordered to remitting mortal sins, and therefore cannot demand a disposition which already of itself remits mortal sins (St. Alphonsus, VI, 440). He who receives the sacrament of Penance without attrition sins gravely, because the sacrament is rendered invalid. Likewise, he sins gravely who, guilty of personal mortal sin, receives Baptism without attrition; for he inflicts grave injury on the sacrament who receives it in such a way that it is frustrated of its grave end, that is, the remission of mortal sins. If one guilty only of personal venial sin receives Baptism without attrition, he indeed effects that Baptism does not remit the venial sin; but only venial sin is committed.
For the sacraments of the living, the state of grace is required.
a) The existence of the obligation is clear from the fact that those sacraments are ordered to increasing grace; hence grace must already be present. Nevertheless, as was said concerning the minister, a necessity excuses which is so urgent that not even an act of contrition can be elicited; for example, "if a consecrated host were about to be profaned by heretics and someone, because of that sudden incursion, could not be contrite so quickly"; or if "a layman were reclining at the communion rail who remembered a mortal sin and could not elicit contrition because of the narrowness of time" (St. Alphonsus, VI, 86).
b) Gravity of the obligation. He who receives a sacrament of the living in mortal sin sins gravely, because he is guilty of grave injury who receives a sacrament of this kind without the disposition which its nature demands, or without the disposition required for the end or fruit to which it is of itself ordered, which is the increase of grace. There is added that a sacrament of the living received in mortal sin, even with attrition, according to some produces no fruit at all except character (n. 6; St. Alphonsus, VI, 86).
c) The certainty required concerning the state of grace. In order that someone licitly receive a sacrament of the living, at least broad moral certainty concerning the state of grace is required; but this also suffices. It is required because otherwise the one receiving exposes the sacrament to grave danger that it be received without the disposition which its nature demands, or without the disposition required for the fruit to which it is of itself ordered, to pass over the danger that it be received without any fruit at all; and this contains grave irreverence (St. Alphonsus, Homo Apostolicus, tract 15, n. 34). There is added that most authors, especially the more distinguished, adhere to this opinion. It suffices because these things must be taken in a human manner.
Objection. In order that someone who has sinned gravely be morally, although broadly, certain of the state of grace, he must either confess or elicit contrition with exquisite diligence. But the reverence due to the sacrament cannot oblige to so great a burden.
Response. I deny the assertion. Namely, in order that someone acquire broad moral certainty concerning the state of grace, it suffices that he either confess or elicit an act of contrition with moral diligence. God Almighty will not deny His help to one applying serious effort. For the rest, granted, though not conceded, the assertion of the adversaries, the burden set forth does not seem so great that, in order to avoid it, it would be licit to expose the sacrament to grave danger that it be received without the disposition required for the fruit to which it is of itself ordered, to say nothing of the danger that it be received without any fruit at all.
d) The mode of recovering lost grace. He who, constituted in mortal sin, wishes to receive a sacrament, can recover grace through an act of perfect contrition or through confession. If, however, there is question of receiving the Holy Eucharist, confession is required of itself; this obligation will be explained more fully in the treatise on the Eucharist. With regard to receiving the other sacraments, it is indeed fitting to confess, but there is no obligation.
Note. Besides the state of grace, the reverence due to the sacraments requires that the sacraments be received according to the rite perhaps prescribed in reception, and with that decency which the nature of the sacrament demands. To this especially belongs due attention, neglect of which nevertheless is only venial.
1 Council of Trent, On Justification, Session 6, chapter 6; On Penance, Session 14, chapter 4.
II. They must ask for the sacrament from a minister: 1. enjoying legitimate faculty; 2. not censured, that is, not excommunicated, interdicted, or suspended, not irregular, or not canonically simply impeded; and 3. worthy, that is, living in the state of grace. Observe, however, that every minister is presumed suitable unless the contrary is established. But in order that the contrary be established, rumors do not suffice; indeed, one who has been a sinner is generally presumed amended, unless the contrary is evident, for example from a manifest voluntary proximate occasion not left behind. For the rest, receive these things:
It is a grave sin to ask for a sacrament from a minister here and now lacking legitimate faculty.
Of itself it is a grave sin to ask for a sacrament from a minister who is censured, irregular, canonically simply impeded, or unworthy because of grave sin, because it is proximate cooperation in the grave sin of the minister. Accidentally it is licit when a cause proportionate to the case and circumstances is present. This is clear from the things said concerning cooperation (n. 556) and from the canons soon to be cited. Hence:
a) From excommunicates to be avoided, and also from other censured persons after a condemnatory or declaratory sentence has intervened, the faithful can ask, in danger of death alone, both sacramental absolution according to the norm of canons 882 and 2252,1 and also, if other ministers are lacking, the other sacraments and sacramentals (can. 2261, § 3; 2275, 2; 2284).
b) From tolerated excommunicates, and also from other censured persons before a condemnatory or declaratory sentence has intervened, the faithful can ask for the sacraments and sacramentals for any just cause, especially if other ministers are lacking; and then the censured person who is requested can minister the same and is held by no obligation to inquire of the requester about the cause (can. 2261, § 2; 2275, 2; 2284).
c) Concerning irregular persons and those canonically simply impeded, almost the same seems to have to be said as concerning excommunicates to be avoided (cf. can. 968, § 2).
d) Sacraments can be asked from a minister unworthy because of sin: 1. if the precept of confession or communion urges; 2. "if from delaying reception there threatens danger of a fall; 3. if you must fulfill the precept of hearing Mass; 4. if one is in mortal sin and does not wish to wait even an hour, because it is not a small usefulness to be freed from sin as soon as possible; 5. if you would have to lack, at least for a long time, communion or the fruit of confession, even if you do not have mortal sin; 6. if otherwise you cannot gain a jubilee; 7. if you need a skilled director and do not have another; 8. if you wish to apply Mass for a deceased friend" (St. Alphonsus, VI, 89). Indeed, for any just cause a sacrament can be asked from one whose office it is to administer such a sacrament, for example from one's own pastor (St. Alphonsus, loc. cit.).
1 The cited canons will be explained in their own place.
Note. It is pleasing to explain briefly how far the sacraments can be ministered to little children, the insane, and the partially insane, and received by the aforesaid.
I. Little children and the perpetually insane, as was already said (n. 38), are capable of receiving Baptism, Confirmation, the Holy Eucharist, and Order. Yet not all are conferred on them.
II. To the insane who previously possessed the use of reason, those things must be applied which we said generally concerning adults. Hence, for example, for valid reception it is required that before insanity they had the intention and did not retract it. For the rest, consult what is to be said concerning the individual sacraments.
III. The partially insane are not of themselves to be kept away from the sacraments. Namely:
Baptism must be conferred on them even outside danger of death; nor is so much instruction prerequired in them as in others.
Confirmation can be conferred, even if they have been instructed less than others.
Absolution should be granted, in doubt about sufficient use of reason or disposition under condition: 1. in danger of death; 2. at Easter; 3. as often as they have confessed a doubtfully grave sin; indeed, 4. several times, even if they have declared only light sins (St. Alphonsus, VI, 432; IV, 3).
The Holy Eucharist should be conferred: 1. in danger of death; 2. at Easter; 3. several times, if they show devotion (St. Alphonsus, VI, 303).
Extreme Unction should be furnished to those lying dangerously ill; under condition if there is doubt about the use of reason had both now and previously.
Order is not to be administered to them.
They can indeed enter Matrimony if they understand the substance of the contract; nevertheless they are generally to be turned away from it.