But when the king came in to look at the guests, he saw there a man who had no wedding garment. And he said to him, "Friend, how did you get in here without a wedding garment?" And he was speechless.
Matthew 22:11-12

This man was invited and admitted to the wedding feast, but was kicked out again. What does that say about those who are "in" and the doctrine of eternal security? Not all who are in the Kingdom now will be allowed to remain beyond Judgment Day.