What does Psalm 95:5 mean?

People should praise the Lord (Psalm 95:2) because His infinite power is evident in nature (Romans 1:20). He created everything which exists (Genesis 1:1; John 1:1–2). The highest mountains and lowest valleys are His (Psalm 95:4). So are all the oceans and their borders (Genesis 1:9).

The psalmist has already stated that God is "above" all other deities (Psalm 95:3). None of the false gods worshipped in other cultures could do what the Lord did. He alone is the Creator of all things. Further, God creates simply by expression: by "speaking" them into being (Psalm 33:6; Hebrews 11:3).

Pagan nations around Israel had many false gods, often assigned to a part of nature. There were gods and goddesses of the sun, the moon, the stars, the land, the rivers, the mountains, etc. However, there is only one true God, and He created everything. Many of the miracles God performed during the exodus from Egypt (Exodus 3:20) demonstrated His superiority over Egyptian idols.