Without some research on the customs of the day, this story seems like harsh treatment of a guest who simply didn’t wear a robe. However, in stories Jesus tells, things are rarely as they seem. The parable, of course, is a metaphor for the Kingdom of God. Getting in is by invitation, though everyone is invited. Accepting the invitation is revealed as much more than merely attending for free food and dancing. As the scriptures express elsewhere, we are actually the bride, and the groom is Christ.