What is the Lord’s Supper?
Christ commanded all Christians to eat bread and to drink from the cup in thankful remembrance of him and his death. The Lord’s Supper is a celebration of the presence of God in our midst; bringing us into communion with God and with one another; feeding and nourishing our souls. It also anticipates the day when we will eat and drink with Christ in his Father’s kingdom.
(New City Catechism)
Nothing says it better than this.
We should not be eating here;
crumbs beneath the table are
more than we deserve.
But come –
The table welcomes us, carries for us
the means by which we come.
Water, wine, bread: so elemental,
so assumed, passed by as ordinary.
Heaven in ordinary greets in this meal:
the simplicity of friends gathered at table,
the wonder of friendship
with the Bread and the Vine.
The Consolations of Writing 