What does Psalm 93:2 mean?

The prior verse (Psalm 93:1) referred to God's power and creation of the universe. His supreme authority over all that He has made is beyond any possible dispute. God Himself is "from everlasting:" He is the only uncreated Being (John 1:1–3) and the source of everything else which exists (Genesis 1:1). There is no time or space in which the Lord God is not sovereign (Psalm 90:2).

Ungodly rulers may lead nations against the Lord, trying to topple His throne. Those efforts will be in vain. Psalm 2 portrays a vast coalition staging a revolt against God the Messiah (Psalm 2:2–3), but the Lord will find the attempt pathetic (Psalm 2:4). His anger will cause them terror (Psalm 2:5). Other prophetic books depict God on His throne, worshipped by angels (Isaiah 6:1–3; Revelation 4:2–3). Even the strongest and most brilliant human beings die (Hebrews 9:27). Yet the Lord with a majestic throne never dies. He lives and reigns forever (Psalm 93:2).