It is necessary to confess our sins to those to whom the dispensation of God’s mysteries has been entrusted. Those doing penance of old are found to have done it before the saints. It is written in the Gospel that they confessed their sins to John the Baptist; but in Acts they confessed to the apostles, by whom also all were baptized.
St. Basil of Caesarea St. Basil of Caesarea
Source: Rules Briefly Treated 288 (375 A.D).