If you are really convinced that the Catholic religion is false and your present religion true, you could not do so. You would be violating your conscience in a very grave matter. But you have probably taken your Protestant religion for granted, and have never gone deeply into the question. For the sake of the girl you can have the Catholic religion explained to you by a Priest. And if at the end of your instructions, you believe in it, you can become a Catholic for the love of God and for the religion’? own sake. In this way you would not be becoming a Catholic for the sake of the girl, for you would become a Catholic in any case, even were you never to marry a Catholic. But if, at the end of your instructions, you still believed Catholicism false, you could not become a Catholic. That should be clear.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty