The second part of the parable of the Wedding Feast has often troubled many, because they are not able to understand why the one without the wedding clothes was cast out, when a few verses below the servants are told to go out and invite both good and bad. The question that arises is - How could those unexpectedly herded into the wedding feast from the streets wear the expected clothing, which all but one seem to do? The point is that realism is sacrificed to theological meaning. In early Christianity, the new identity of conversion was often pictured as donning a new set of clothes, the language of changing clothes was used to express the giving up of old ways and adopting the new Christian identity (see Rom 13:12-14; Gal 3:27; Eph 6:11). The man was thus expected to have the deeds of an authentic Christian, which he does not have.
We sometimes attend the Eucharistic banquet without the appropriate garb, which is a faith that shows itself in action. This “dead faith” renders us unworthy, and in danger of being “cast out”. Unless we can show through our deeds that we are Christians, our celebration of the Eucharist will remain at the theoretical and ritualistic level, having no relevance to our lives.