1 Cor 11, 23-26 Hermanos: Yo recibí del Señor lo mismo que les he transmitido: Que el Señor Jesús, la noche en que iba a ser entregado, tomó pan en sus manos, y pronunciando la acción de gracias, lo partió y dijo: “Esto es mi cuerpo, que se entrega por ustedes. Hagan esto en memoria mía”.

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.     (# 1407 Catechism of the Catholic Church)