He must have Baptism at least of desire; he must be ignorant of the fact that the Catholic Church is the only true Church; he must not be responsible for that ignorance by deliberately neglecting to inquire when doubts have perhaps come to him about his position; and he must die with perfect contrition for his sins, and with sincere love of God. But such good dispositions are an implicit will to be a Catholic. For the will to do God’s will is the will to fulfill all that He commands. Such a man would join the Catholic Church did he realize that that was part of God’s will. In this sense the Catholic Church is the only road to Heaven, all who are saved belonging to her either actually or implicitly.
Radio Replies Volume 1 by Rev. Dr. Leslie Rumble MSC and Rev. Charles Mortimer Carty