a certain sense necessary. The Catholic doctrine on this point has been defined by the Vatican Council. “To this Divine revelation it belongeth that those Divine things which are not impervious to human reason may, in the present state of the human race, be known by all with expedition and firm certainty, and without any mixture of error. Nevertheless not on this account must Revelation be deemed absolutely necessary, but because God of His infinite goodness hath ordained man to a supernatural end,