The People Who at God's Great Supper Reject Their Invitation

The feast of the parable proceeds in a typical way. It begins with invitations being sent out to socially respectable people. They are all too committed to their possessions and relationships to accept them. The man then turns to the poor, the crippled, the blind and the lame. This has often been related to marginal jews and gentiles. These people must be compelled into the feast, presumably because they knew that they couldn't offer anything in return. A question to consider is how does the celebration of the eucharist or lord's supper provide us with training in the table manners of the kingdom?