To the original poster:
Yes you are correct that one is obliged to confess the number of the mortal sins --Lust, murder 2x, adultery 3X…etc. (venial sins do not “need” to be confessed and if they are they do not need to be by number…)
If one forgets mortal sins…one mentions it in the next confession.
Now since you mention you struggle with scrupulosity – discuss this with your regular confessor. He should be able to direct you.
It can depend on your particular difficulties and the nature of what you forgot…as to what your next step is… (at times those with scrupulosity can be in a very different boat then those without such difficulties… and I add this too for all out there in a like boat…your confessor can guide you)
I again want to underline…if a reader is scrupulous or struggles to with scruples…have a regular confessor. If the question of “past sins” come up discuss the matter with him…do not scruple here. Often those with this difficulty can worry and fear needlessly about such. Often they might be advised by their confessor regarding past sins…for example: only confess it if it is both certain that it was a mortal sin and certain that they have not confessed it…
Regarding the need to confess in number and kind and if one forgets such …the obligation to mention in next confession if one remembers.
Catechism of Trent:
"Sins Forgotten
But should the confession seem defective, either because the penitent forgot some grievous sins, or because, although intent on confessing all his sins, he did not examine the recesses of his conscience with sufficient accuracy, he is not bound to repeat his confession. It will be sufficient, when he recollects the sins which he had forgotten, to confess them to a priest on a future occasion."
Catechism of Pope St Pius X:
Q: If a mortal sin, forgotten in confession, is afterwards remembered, are we bound to confess it in another confession?
A: If a mortal sin forgotten in confession is afterwards remembered we are certainly bound to confess it the next time we go to confession.
Baltimore Catechism:
Q. Is our confession worthy if, without our fault, we forget to confess a mortal sin?
A. If without our fault we forget to confess a mortal sin, our confession is worthy, and the sin is forgiven; but it must be told in confession if it again comes to our mind.
Prummer OP
“An incomplete confession (note he means here in terms of mortal sins forgotten) should be completed by the accusation of the sin”
Fr. Herbert Jone "Moral Theology) (Tan)
“If in indicating the number of sins ones erroneously minimizes, the mistake must be corrected in the following confessions.”
(one can find various references in works of moral theology or works on confession)
Catechism of the Catholic Church:
1456 Confession to a priest is an essential part of the sacrament of Penance: "All mortal sins of which penitents after a diligent self-examination are conscious must be recounted by them in confession…
Compendium issued by Pope Benedict XVI
- Which sins must be confessed?
1456
All grave sins not yet confessed, which a careful examination of conscience brings to mind, must be brought to the sacrament of Penance. The confession of serious sins is the only ordinary way to obtain forgiveness.
Cardinal Ratzinger:
“At this point the Council can say that it is necessary iure divino (by divine law) to confess each and every mortal sin.”
Cong. Discipline of the Sacraments:
“The divine constitution of the Sacrament of Penance requires each penitent to confess to a priest all mortal sins…”
Fr. John Hardon (Catholic Dictionary):
catholicreference.net/index.cfm?id=33610
see also for Canon Law and summary:
forums.catholic-questions.org/showpost.php?p=8710098&postcount=36
A bit from
Jimmy Akin (Senior Apologist at Catholic Answers):
A reader writes:
Code:
I am aware that if one goes to confession and supplies the requisite contrition, then all sins which the person committed are absolved--provided that the person does not intentionally conceal any mortal sins.
Correct.
Code:
Also, I have been told by several priests that this means that if one remembers a mortal sin after confession, they should know that they are forgiven for it so long as they mention it the next time they go to confession.
Correct, though this should be formulated a little differently. You are forgiven if you meant to confess all your mortal sins and just forgot one. Having been forgiven of the one you forgot, you are still obligated to confess it the next time you go to confession. It’s not that your forgiveness of it is conditional on you adopting the intention to confess it next time. That sin has already been forgiven. It’s that you incur a new sin if you refuse to adopt the intention of confessing it. (
jimmyakin.org/2006/09/a_reader_writes_1.html)
and a couple others:
ewtn.com/vexperts/showresult.asp?RecNum=611641&Forums=0&Experts=0&Days=2010&Author=&Keyword=number&pgnu=1&groupnum=0&record_bookmark=28&ORDER_BY_TXT=ORDER+BY+ID+DESC&start_at=
David M. Gregson, Ph.D.
ewtn.com/vexperts/showresult.asp?RecNum=594654&Forums=0&Experts=0&Days=2010&Author=&Keyword=confession&pgnu=4&groupnum=0&record_bookmark=171&ORDER_BY_TXT=ORDER+BY+ID+DESC&start_at=
Remember it is not a “memory test” there can be times when one simply does not know after one examines how many of a particular mortal sin one committed --especially if one has been away from the Church for a while…one can “approximate” if need be and certainly one ought not scruple in these things. Our memory may not be like that of “Spock”…
