What is the final criterion? What is the ultimate standard for good reasoning? And if God exists, He is the standard. He is the font of wisdom. He is the one who knows all the relationships between everything in the world that He has made, and when He comes to you and offers you an argument, you can be sure that that’s right. The apostle Paul says, “I beseech you therefore, brethren …” (Rom 12). Looking back on Rom 1–11, he says, “I beseech you therefore, brethren, by the mercies of God, that you