And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God. A sea of glass - A spacious lucid plain around the throne, from which fiery coruscations were continually emitted: or, the reflection of the light upon this lucid plain produced the prismatic colors of the most vivid rainbow.
Over the beast, and over his image - See the notes on Revelation 13:1-18 (note).