Is it wrong for a person to go to confession and only confess some of their sins but not all of them, namely only confess the sins that they truly believe are sinful and are genuinely sorry for having committed them?
Let's say a penitent knows the teachings of the Church regarding what is and isn't sinful, but at the moment disagrees with the Church about the nature of one such sin. On the one hand, she recognizes that she has no right to just take it upon herself and say that such-and-such is not sinful. She fully recognizes the Church's prerogative in saying that it is indeed sinful, yet she just cannot in her heart come to the same conclusion herself. Given this, she cannot be truly remorseful for committing the act until her intellect becomes aligned with that of the Church. She recognizes that her conscience is not properly formed since it is out of sync with the teachings of the Church, and she intends to work on bringing her conscience in line with said teachings, but in the interim, at this very moment, she is not remorseful for the act. She nevertheless would like to unload her other sins that she does find sinful. She would, thus, like to go to confession, confess the sins she is remorseful for, receive absolution for those specific sins, knowing that she will leave the confessional still in a state of sin (due to the other unconfessed sins), still unable to receive the Eucharist, yet still completely intending to work out her intellectual reservations.
Is this allowed, or is this sacrilege?
If it isn't allowed, then what can she do until she comes to the point that her conscience is in line with the Church? Is there any way to be absolved of certain sins but not all sins?