Article VII: Of the Keys.

The keys are an office and power given by Christ to the Church for binding and loosing sin, not only the gross and well-known sins, but also the subtle, hidden, which are known only to God, as it is written in Ps. 19, 13: Who can understand his errors? And in Rom. 7, 25 St. Paul himself complains that with the flesh he serves the law of sin. For it is not in our power, but belongs to God alone, to judge which, how great, and how many the sins are, as it is written in Ps. 143, 2: Enter not into judgment with Thy servant; for in Thy sight shall no man living be justified. And Paul, 1 Cor. 4, 4, says: For I know nothing by myself; yet am I not hereby justified.