What is the sacramental reasoning behind the canceling of the remission of all the time-related effects of past sins?
I fully believe in and act on everything the Church teaches. I simply do not understand how we understood the remission of all the temporal effects of past sin.
a
Basically, every sin carries with it a penalty or punishment, either eternal or temporal. The consequence of mortal sin is eternal punishment and venial sin has a temporal punishment. We sin when we break God’s law and breaking God’s law incurs a penalty as well as guilt. An analogy is like if we break the civil law of running through a red stop sign, we may incur a penalty, that is, a ticket for doing this. Laws are enforced by deterrents and deterrents are penalties or punishments for breaking the law.
The sacrament of confession has three parts, namely, contrition or sorrow for our sins, confession, and satisfaction or penance. The priest usually gives us a penance to perform after we confess our sins to him such as saying 3 hail mary’s. This penance is to atone in some way for the penalty or punishment we incur by sinning. By contrition and confession, Jesus forgives us of our sins, the guilt part, but we still may need to satisfy or atone for it, this is the punishment part. This is all scriptural. Our Lord Jesus Christ suffered his passion, crucifixion, and death to atone for our sins. And Jesus is our example and our atonement for our sins is based on the atonement that Jesus made for us and is founded on that atonement he made for us. Jesus opened the gates of heaven for us but we need to take up our cross daily and follow Him to get to heaven.
You may want to read the Enchiridion of Indulgences which will help you gain an understanding of the question you raise here and the lingering effects of our sins that remain in us. Especially read the Apostolic Constitution “Doctrine of Indulgences” of Pope Paul VI towards the end of the book ( link to book below). The Church’s doctrine of Purgatory is also linked to your question. Purgatory is where souls are purified of the lingering effects of sin, that is, the temporal punishments we incur by our sins but did not make up for in this life. Also of note is that contrition itself if it is pure enough can atone for all the temporal punishments we incur by our sins. Of course, we still need to go to confession.
Link to Enchiridion of Indulgences:
basilica.org/pages/ebooks/Sacred%20Apostolic%20Penitentiary-The%20Enchiridion%20of%20Indulgences.pdf