What does Revelation 7:10 mean?

This verse focuses on the praise delivered by the multitude described in the previous verse. These believers have learned that only God, through His Son Jesus, can forgive sins and grant eternal life. Their acknowledgement that salvation is completely God's work apart from human efforts is similar to the praise Jonah offered just before God ordered the great fish to spit him out on land. Jonah cried out from the fish's belly, "Salvation belongs to the LORD!" (Jonah 2:9).

To provide for our salvation, God gave His Son Jesus, the Lamb, as our perfect substitute. Jesus took our penalty on the cross and freed us from sin's penalty and power. Romans 5:6 states: "While we were still weak, at the right time Christ died for the ungodly." It is significant that the multitude cried out to "God who sits on the throne" (Revelation 7:10), because God is a sovereign ruler. He could have chosen to let the multitude perish, but by an act of His will He chose to save those who believed on the Lamb and to rescue them from their persecutors.