"If we confess our sins, he who is faithful and just will forgive us our sins and cleanse us from all unrighteousness."
Catholics, of course, have externalized this (and other) passages into a sacrament. Metaphysically, however, we don't affirm a need for a confessor—an intermediary between ourselves and the Divine. We are the Divine, and the process of forgiveness is an inside job. If we refuse to admit to ourselves that we've done something wrong, we stay locked in the energy of that "sin." The internal process of forgiveness breaks the power of the "sin," and allows the Spirit we truly are to "cleanse us."