John did not see a real sea, but a broad expanse like a
sea of white transparent glass or stone that has a glassy
appearance and reflects an image. The glassy expanse like a
sea is designed to communicate the concept of the reflection
of God’s glory. Perhaps also it stands as a symbol for the
Word of God and its many promises and truths that reflect
God’s character or person, plan, principles, and purposes.
In Revelation 4:6, it was likened to crystal and stood for
the perfect righteousness of God, here in Revelation 15:2 it
is seen mingled with fire, which, as a symbol of judgment,
stands for the perfect justice of God and his actions with
men. It is also seen upholding the saints who stand firmly
upon it. This reflects the immutable faithfulness of God in
His grace and love to His people through His perfect plan of
salvation in Christ. This plan, like a rock, upholds man and
brings sinful man into God’s presence if he will come to God
through Jesus Christ (John 14:6).
Because of the reference to the beast and his work, these
are clearly the martyred dead of the Tribulation. They are
described as “those who had been victorious over the beast
and his image and the number of his name.” The means of
their victory is faith in Jesus Christ and the Word, but
this is always a victory based on the victory accomplished
by the Savior’s death for us through the cross and His
resurrection (John 16:33). Because of their victory in
Christ, they were delivered from the beast, his image, and
his mark.
These martyrs are seen standing on the glassy expanse. As
mentioned, this reminds us their victory and position is a
result of who and what God is to the believer as revealed in
the Word. He alone can uphold us. All victory comes from
faith in the Lord and His immutable and faithful promises.
“Standing” emphasizes the permanence of this position in
contrast to the temporary victory that would have been
theirs had they rejected Christ and worshipped the beast.
John sees these saints holding harps of gold. This is part
of their reward as mentioned in Revelation 14:13.
