Chapter 3 — Third and Fourth Head of Doctrine: Of the Corruption of Man, His Conversion to God, and the Manner Thereof
Section 15. Article 15: Responses to God’s Grace. God does not owe this grace to anyone. For what could God owe to those who have nothing to give that can be paid back? Indeed, what could God owe to those who have nothing of their own to give but sin and falsehood? Therefore those who receive this grace owe and give eternal thanks to God alone; those who do not receive it either do not care at all about these spiritual things and are satisfied with themselves in their condition, or else in self-assurance foolishly boast about having something which they lack. Furthermore, following the example of the apostles, we are to think and to speak in the most favorable way about those who outwardly profess their faith and better their lives, for the inner chambers of the heart are unknown to us. But for others who have not yet been called, we are to pray to the God who calls things that do not exist as though they did. In no way, however, are we to pride ourselves as better than they, as though we had distinguished ourselves from them.