In Hebrews 10, we learn that, just as shadows are not a reality of what they are reflecting, sacrifice (in the old testament) was a reminder of sin and not the actuality of forgiveness. Christ’s once (and for all) sacrifice was the real road to forgiveness and communion is our reminder of Christ’s bodily death and bodily resurrection. We are then encouraged to remember that, as Christ’s sacrifice required a bodily presence among us, so too our physical presence is required when joining together in order to build lasting relationships.