I think that the passage from Matthew (Matt. 22:1-14) serves as a sober warning to all of us. We perhaps like to think of the guest who did not have a wedding garment on (Matt. 22:11) as someone very far from us--"certainly this doesn't speak of us, or our parents, or our friends... we're Orthodox, after all!" But the fact of the matter is that this man was invited to the banquet and went to it, though he was unprepared. He was invited, was a participant, and yet was condemned (Matt. 22:13). Safety is not in calling oneself Orthodox, but in actually being Orthodox. Even "Orthodoxy" means nothing if it is reduced to intellectual affirmations and Church affiliation: without the "wedding garment" of the divine virtues and sacraments, without the rugged boots of asceticism, we are not in actuality participants.
Cyril of Jerusalem makes it clear in his interpretation of the passage that the man should have realised that he was unprepared, and this is a warning to us: "Thou seest what happened to that man: make thine own condition safe." (Catechetical Lectures, Prologue, 3-4) There's a reason that we call the judgment seat of Christ dread or awesome. We like to forgive our own inadequacies here on earth (much like this man ignored that he was umprepared), but there everyone will be judged fairly and without bias. Things will be very clear on that day: we have the proper attire on, or we do not, either way we had our chance and now the Master will have come to discern our preparedness.
Now are more people going to start posting the sermons or at least summaries of the sermons they hear at Divine Liturgy every week?