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, even if they are most secret and have been Committed against the Last two precepts of the Decalogue; for these Sins sometimes wound the Soul more grievously and are more dangerous than those which are committed openly." 54