1. What is the sole and perfect rule of our faith and conduct? It is the Word of God which is now contained in Holy Scripture, that is, in the canonical books of the Old and New Testament. This is the rule to which God Himself sends us in the Old Testament, “To the law and to the testimony” (Is. 8:20). Our Lord Jesus Christ does the same thing in the New Testament, “Search the Scriptures” (Jn. 5:39). Besides, we find in Holy Scripture all the promises of God concerning our salvation and everything that relates to that salvation. Saving faith holds onto these promises without going any further (Jn. 20:31). We also find there the commandments of God, which serve as a rule of our conduct (Ps. 147:19). We can do nothing beyond these (Mt. 22:37) and we ought to do nothing without them (Mt. 15:9), for the law of the Lord is perfect (Ps. 19:8). Read more»