Eucharist

The Eucharist is the source and summit of the Christian life. The other sacraments, and indeed all ecclesiastical ministries and works of the apostolate, are bound up with the Eucharist and are oriented toward it. For in the blessed Eucharist is contained the whole spiritual good of the Church, namely Christ himeself, our Pasch. (Catechism of the Catholic Church, 1324)

The inexhaustible richness of this sacrament is expressed in the different names we git it. Each name evokes certain aspects of it. It is called Eucharist, because it is an action of thanksgiving to God. The Greek words eucharistein and eulogein recall the Jewish blessings that proclaim - espeically during a meal - God's works: creation, redemption, and sanctification. (Catechism of the Catholic Church, 1328)