Saving grace is not manifest in nature; yet it is the God of saving grace who manifests himself by means of nature. How can these two be harmonized? The answer to this problem must be found in the fact that God is “eternal, incomprehensible, most free, most absolute.” Any revelation that God gives of himself is therefore absolutely voluntary. Herein precisely lies the union of the various forms or God’s revelation with one another. God’s revelation in nature, together with God’s revelation in Scripture,