This is a lesson about the Holy Eucharist, a central sacrament in faith. It defines the Eucharist as a sacrament, sacrifice, and banquet where Jesus Christ is contained, offered, and received under the appearance of bread and wine. The lesson explains the importance of the Eucharist to both individual Christians and the Church as a whole, highlighting its role as the summit and source of Christian life. It also details the history of the Eucharist, including its institution by Jesus Christ at the Last Supper.