Eucharist

"The Eucharist is the heart and the summit of the Church's life, for in it Christ associates his Church and all her members with his sacrifice of praise and thanksgiving offered once for all on the cross to his Father; by this sacrifice he pours out the graces of salvation on his Body which is the Church" (Catechism of the Catholic Church, 1407 and Jn 6:51, 54, 56).

The liturgical action called the Eucharist is also traditionally known as the Holy Sacrifice of the Mass. The Holy Eucharist completes Christian initiation. The Sunday celebration of the Eucharist is at the heart of the Church’s life.