A look at the doctrine of Authority in the Catholic Church.
This is nothing fancy, just a little script you might learn from. In Catholic Answers’ seminars we try to emphasize the point that you should always demand that a missionary who comes to your door first establish his authority for what he is going to tell you, and only then proceed to discuss the particular issues he has in mind.
By "authority," we don’t mean his personal or academic credentials. We mean his authority to claim he can rightly interpret the Bible. The missionary will always claim to fall back on the authority of Scripture. "Scripture says this" or "Scripture proves that," he will tell you.
This tract will give you some helpful arguments and Scripture verses when discussing the Protestant notion of Sola Scriptura with a non-Catholic as well as providing a basis for laying out where the Canon of Scripture came from.
Also available individually. Click here.