Now a lot times we think the bride wears the white dress to show that she’s a virigin or that she’s pure, and that is part of the tradition. In this case, the linen garment shows in an outward way that on the inside is pure. This is one of the reasons that in Corinthians the Church says before you go to receive the Eucharist, you should be in a state of grace. You should not have serious sin. You should not have mortal sin in your soul. You should go to Confession before you go to Communion.
What the Church is trying to teach us, what God is revealing to St. John to reveal to us is Revelation. The book of Revelation is not a book of damnation and hell; the book of Revelation is about a wedding.