The Eucharist and the Mass
The Eucharist joins thanksgiving, sacrifice, Christ’s real presence, and sacramental communion. At Mass the Church participates in the one sacrifice of Christ; she does not repeat his crucifixion. Catholics confess that the bread and wine become his Body and Blood while their sensible appearances remain. Preparation for communion includes faith, reconciliation where needed, and charity toward others.
Follow the sources
An original library introduction, with sources for further study. This is a starting point rather than a complete treatment or a finished formation lesson.