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 designate a manifestation of truth by God to man by a light superior to reason. In this meaning it is properly called "supernatural revelation". It is supernatural, because such light is not part of our nature, nor due to it, nor attainable by its unaided power. It supposes a special action of God announcing the truth to man. He has made this announcement through Prophets, Apostles, and other sacred writers, but especially through His Divine Son. He has thus taught us that we are destined to a supernatural happiness to which our nature cannot possibly give us a claim, and which is to consist in our seeing God face to face. A supernatural end cannot be reached but by supernatural means which our nature by its own powers can neither discover nor employ (n. 172).

9. To make known to us our supernatural end and the means of attaining thereto, a supernatural revelation was, therefore, absolutely necessary. Though it is not thus necessary for the knowledge of natural truths, even of such as regard religion and morality, still many difficulties impede the acquisition of such knowledge by unaided reason. In particular, very few men have the talent and the opportunity to study such subjects deeply; and, even under the most favorable circumstances, owing to the depravity of the human heart, there always have been doubts and errors 011 many important points of morality and religion. This is abundantly proved by the history of past ages; and it is seen even to-day in the teachings of various philosophic systems which deny, or at least question, our most important duties to God. Therefore, a supernatural revelation is, not indeed absolutely, but yet relatively necessary for the proper understanding even of the natural law; it is necessary considering the condition of mankind. It may also be