What does Psalm 33:9 mean?

Once again, David refers to the Lord's creative speaking as the means by which everything was created (John 1:3). Theologians refer to God's creative work as ex nihilo, meaning out of nothing. He did not rely on the prior existence of some energy or material to create the heavens and the earth. The Lord "spoke" and everything came into existence. In the biblical context, this does not require literal words: audible syllables in some language. The power of God's "speech" is not a magic incantation, but the pure expression of His will. When God willed light to exist, light came to be (Genesis 1:3). The same is true of His other creative works (Genesis 1:6, 9, 11, 14).

Hebrews 11:3 states: "By faith we understand that the universe was created by the word of God, so that what is seen was not made out of things that are visible." Genesis 1:1 states: "In the beginning, God created the heavens and the earth." When God created all things, He established laws in nature that continue today. For example, the law of gravity operated in Old Testament times and continues today. If someone tries to ignore the law of gravity by jumping from a tall building, he will discover that the law applies, whether or not they approve. This is true of anything God chooses to enforce (Psalm 33:10; Job 42:2).