On Closed Communion

The following is my response to one of my catechumens to the question of why the Orthodox Church practices a closed communion. Basically, Communion creates and defines our community, our being one with one another in Christ—i.e. eating of the one bread and of the one cup.  Historically, some people/groups separated themselves from the communion of the Church through heresies or immorality or aligning themselves with a heretical bishop.  Therefore, they are…