Simplify the following text for a Grade 9 native English-speaking person.
Original: Opus Dei , formally known as The Prelature of the Holy Cross and Opus Dei , is an organization of the Catholic Church that teaches that everyone is called to holiness and that ordinary life is a path to sanctity .
Simplified: Prelature of the Holy Cross and Opus Dei or more commonly known as Opus Dei , is an organization of the Roman Catholic Church .