Let us go to Genesis, the first chapter, the first verse. Believe it or not, God starts out His Word with a merism. The first one in the Bible, obviously.
Those are the two extremes - heaven, earth - and a merism says those represent everything in between. So the first verse of the Bible says that God created everything. There was nothing created that He did not create. There is no thing, no material thing or spiritual thing in all the universe that He is not the source of. So I think that is very understandable.