The name given to the Blessed Sacrament of the Altar in its twofold aspect of sacrament and Sacrifice of Mass, and in which Jesus Christ is truly present under the bread and wine.

Other titles are used, such as "Lord's Supper" (Coena Domini), "Table of the Lord" (Mensa Domini), the "Lord's Body" (Corpus Domini), and the "Holy of Holies" (Sanctissimum), to which may be added the following expressions, and somewhat altered from their primitive meaning: "Agape" (Love-Feast),"Eulogia" (Blessing), "Breaking of Bread", "Synaxis" (Assembly), etc.; but the ancient title "Eucharistia" appearing in writers as early as Ignatius, Justin, and Irenæus, has taken precedence in the technical terminology of the Church and her theologians. The expression "Blessed Sacrament of the Altar", introduced by Augustine, is at the present day almost entirely restricted to catechetical and popular treatises.

So, it is sorta like getting married to god. Basically. The Holy Communion is the way a person is told for most of their lives it is okay to be human. A person can go about their lives and commit sins, confess those sins, make an act of contrition and go back to being who they are while still being 'good enough' for heaven. All tied up in a neat little package for the rest of one's life.

It is amazing to realize a little wafer cookie can do all that. I mean they aren't even cooked by the Girl Scouts.

"Shazam, I'm good to go."