19.As Vicar of Him Who in a decisive hour pronounced before the highest earthly authority of that day, the great words: "For this was I born, and for this came I into the world; that I should give testimony to the truth. Every one that is of the truth, hearest My voice" (Saint John xviii. 37), We feel We owe no greater debt to Our office and to Our time than to testify to the truth with Apostolic firmness: "to give testimony to the truth." This duty necessarily entails the exposition and confutation of errors and human faults; for these must be made known before it is possible to tend and to heal them. "You shall know the truth and the truth shall make you free" (Saint John viii. 32).