Why is the bride in Revelation depicted as clothed in bright, white, clean linen?
The bride is depicted in bright, white, clean linen because she is presented as a chaste, pure virgin espoused to one husband, Christ. The white clothing symbolizes her purity, matching the whole concept of a virgin bride who has been kept pure for that one husband.
Les explains that the writer was jealous over the believers with a godly jealousy, having espoused them to one husband so he might present them as a chaste, or pure, virgin to Christ. Les calls this a beautiful picture. This is why the bride is depicted in Revelation as clothed in linen, bright and white and clean: it reflects the whole concept of a virgin bride, and she has always been depicted as wearing white because of her purity. The writer repeats, “I am jealous over you, for I have espoused you to one husband.” Les also notes this goes back to the habit of cultures in days gone by, contrary to the way we do things, where parents would literally pair the children.
And to her was granted that she should be arrayed in fine linen, clean and white: for the fine linen is the righteousness of saints.