At this marriage feast, are only those who have been cleansed by Christ with the washing of water with the Word. The man being there without the white baptismal garment means he must have despised his baptismal wedding garment by soiling it and casting it off. This is what happens when a Christian chooses to live in sin rather than allow the Holy Spirit to lead them to walk in repentance in their Baptism.
The cross wasn’t a divine fallback plan. God saw it all from the beginning, and in His unsearchable wisdom, He determined that this was how He would reign as king—as a merciful king bearing the curse of the Law’s demands for us. For you see, Jesus loved God with all His whole heart, soul, mind and strength. Jesus loved His neighbor as Himself, and on Jesus hang the Law and the Prophets even as He hung there for you.
Though we will all face physical death, Christ will again call out to us on the last day and raise us from our graves. He will call your name and say, “My Son, My Daughter, I say to you, arise.” On that last day, what we just confessed in the Nicene Creed shall become reality. “I believe in the resurrection of the dead, and the life of the world to come.”