upon such a revelation for any certain knowledge that God exists, as well as for all knowledge of his nature and his purposes. This opinion is disproved: (a.) By the direct testimony of Scripture. Rom. 1:20–24; 2:14, 15. (b.) By the fact that many conclusive arguments for the existence of a great first Cause, who is at the same time an intelligent personal Spirit and righteous moral Governor, have been drawn by a strict induction from the facts of nature alone, as they lie open to the natural understanding.