Profane men think that religion rests only on opinion, and, therefore, that they may not believe foolishly, or on slight grounds desire and insist to have it proved by reason that Moses and the prophets were divinely inspired. But I answer, that the testimony of the Spirit is superior to reason. For as God alone can properly bear witness to his own words, so these words will not obtain full credit in the hearts of men, until they are sealed by the inward testimony of the Spirit.

— Selections from Institutes of the Christian Religion by Jean Calvin (Page 20)