The key to understanding what the Mystical Body of Christ is is the fact that it is a visible body composed of members who partake of the Sacraments, profess the faith and submit to legitimate ecclesiastical authority. These are the only members of the Mystical Body of Christ on earth which is one and the same as the Roman Catholic Church. That being said, there are non-members united to this Church by [an] inward or invisible bond(s) of ecclesiastical unity which means, at the very least, they have the Divine Supernatural virtue of Faith though they can also have any of the other virtues and Gifts of the Holy Ghost. The people, who in addition to having the virtue of Faith also have perfect charity and possibly other virtues of the Holy Ghost are those who can be saved within the Church though they are not actual members until the moment of death. Only God can see their inner bond of unity within the One visible Roman Catholic Church despite their not actually being members of that Church. And it is He Who Judges them as being "within" that Church. Fenton