I can't understand, it seems in contrast with the catholic doctrine to me.
I would like some clarification regarding a vision of hell experienced by Don Bosco. What struck me was that the Angel told him many had ended up there because, out of shame, they had not confessed impure sins committed during childhood. I wonder how this is possible. A child cannot possess full awareness; I do not understand how such acts can be considered mortal sins, serious enough to lead to hell if, upon growing up, one does not confess them.
In Saint Alphonsus's Compendium of Moral Theology, there is a statement addressing precisely this point: namely, that sins committed during childhood or adolescence —precisely because they were committed without full awareness— do not require confession.
Here is the text I read:
"He led me into a very deep cavern where those who had sinned against the Sixth Commandment —sins of impurity— were found. I asked him: 'Did they not confess?'"
'They did confess, but the sins of impurity were confessed incorrectly or deliberately omitted. For example: someone who had committed four or five sins of this kind claimed to have sinned only two or three times. Some had committed an impure act in childhood and were always too ashamed to confess it, or they confessed it incompletely or did not recount the whole story. Others still lacked repentance and contrition...'"