17. For your own theories--which are no more than what anyone can arrive at, conjecture or conceive in his own mind, without divine revelation--are not a knowledge of the mind of God. And what does it avail if you are not able to say more than that God is merciful to the good and will punish the wicked? Who will assure you that you are good and that you are pleasing to God with your papistic, Turkish monkery and holiness? Is it all that is necessary to assert: God will reward with heaven such as are faithful to the order? No, dear brother, mere presumption, or an expression of your opinion, will not suffice here. I could do that as well as you. Indeed, each may devise his own peculiar idea; one a black, and another a gray monk's cowl. But we should hear and know what God's counsel is, what is his will and mind. This none can tell you by his own understanding, and no book on earth can teach it except the Scriptures. These God himself has given, and they make known to us that he has sent his Son into the world to redeem us from sin and the wrath of God, and that whosoever believes in him should have everlasting life. DIVINE MYSTERIES INEXPLICABLE TO REASON. 18. Behold, Paul's purpose in this epistle is to show Christians that these sublime and divine mysteries--that is, God's actual divine essence and his will, administration and works--are absolutely beyond all human thought, human understanding or wisdom; in short, that they are and ever will be incomprehensible, inscrutable and altogether hidden to human reason. When reason presumptuously undertakes to solve, to teach and explain these matters, the result is worthless, yea, utter darkness and deception. If anything is to be ascertained, it must be through revelation alone; that is, the Word of God, which was sent from heaven.