Revelation 4:6 ‘Also before the throne there was what looked like a sea of glass, clear as crystal’.
Opinions are divided as to the meaning of this verse. Legend has it that when the Queen of Sheba visited Solomon she thought that a pavement of clear glass that he had set before his throne was water, and she lifted up her skirt to pass through.
One could compare the tranquility of this sea of glass before the throne with the troubled waters of humanity from which will arise the beast of Revelation 13:1.
There was also the great vessel of brass in the temple filled with water from which the priests would wash to cleanse themselves before ministering before the Lord so the sea of glass may speak of cleansing and sanctification.
I would offer, perhaps more poetically than exegetically, that the sea of glass represents transparency. When we approach and stand before God, all our masks and illusions fall away before He who knows us so intimately.
Thank you for reading this!