14 What he has said here of the Gospels he applies in his Commentaries to the rest of the Lord's words; he regards it as the very rule and foundation of Catholic interpretation; indeed, for Jerome, a true prophet was to be distinguished from a false by this very note of truth: "The Lord's words are true; for Him to say it, means that it is." Again, "Scripture cannot lie"; it is wrong to say Scripture lies, nay, it is impious even to admit the very notion of error where the Bible is concerned. "The Apostles," he says, "are one thing; other writers" - that is, profane writers - "are another;" "the former always tell the truth; the latter - as being mere men - sometimes err," and though many things are said in the Bible which seem incredible, yet they are true; in this "word of truth" you cannot find things or statements which are contradictory, "there is nothing discordant nor conflicting"; consequently, "when Scripture seems to be in conflict with itself both passages are true despite their diversity."
Source: Spiritus Paraclitus (Vatican.va)