Why is the wedding garment significant in the parable?

In the parable of the wedding feast, the absence of a wedding garment highlights the necessity of being clothed in Christ's righteousness. This garment represents the spiritual transformation and purity required by God for entry into His kingdom. The man without a wedding garment symbolizes those who approach the Lord with self-righteousness or without the true faith that attains the garments provided by the King. Thus, he faces eternal judgment, illustrating the serious consequence of failing to embody the justified state that comes only through faith in Jesus.