You confound me, believing the bride and the guests are the same. How can it be?
I thought the Bride was the 144,000 (all of Israel) and the great multitude (of every nation, people, kindred and tongue) before the Throne were the invited guess.
Compare to this when Jesus was talking to his "Jewish" disciples on the mountain:
Matthew 7:14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
The same day, after coming down from the mountain, met a Gentile who had great faith; and Jesus said:
Matthew 8:10 When Jesus heard it, he marvelled, and said to them that followed, Verily I say unto you, I have not found so great faith, no, not in Israel.
If the meaning of the white garment is what you say, what does these passages from the Old Testament mean?
Ecclesiastes 9:8 8 Let thy garments be always white; and let thy head lack no ointment.
Zechariah 3:3 Now Joshua was clothed with filthy garments, and stood before the angel.
4 And he answered and spake unto those that stood before him, saying, Take away the filthy garments from him. And unto him he said, Behold, I have caused thine iniquity to pass from thee, and I will clothe thee with change of raiment.
I think something can be learned by studying the lily -- and especially what is called the Easter lily.
Luke 12:27 Consider the lilies how they grow: they toil not, they spin not; and yet I say unto you, that Solomon in all his glory was not arrayed like one of these.
28 If then God so clothe the grass, which is to day in the field, and to morrow is cast into the oven; how much more will he clothe you, O ye of little faith?
What do Easter lilies look like? Secondly, how do they grow? Do they have to know how they grow? Or do they obey the nature given to them and let the God do the rest with his laws governing nature? Men do not obey the nature to them. Do lilies fret over whether there will be enough water, air and light -- or do they take advantage of what God provides, content (so to speak) to have their roots in the soil while God provides the water, air and light they need? I am confident of my view since Jesus continued:
29 And seek not ye what ye shall eat, or what ye shall drink, neither be ye of doubtful mind.
30 For all these things do the nations of the world seek after: and your Father knoweth that ye have need of these things.
31 But rather seek ye the kingdom of God; and all these things shall be added unto you.
I won't deny the efficacy of the Eucharist, but it is also possible to receive the Body and Blood of Christ without the visible bread and wine. Let us not limit the Power of Christ to act on behalf of his followers.
Matthew 18:20 For where two or three are gathered together in my name, there am I in the midst of them.