Isaiah 40:22

The same God who created the world presides over its affairs. He creates history as well as the material universe. The "vault" or "circle" of the earth probably refers to the heavens above as people perceive them (cf. Job 22:14) or, perhaps, to the horizon (cf. Job 26:10; Proverbs 8:27). Isaiah was not revealing that the earth is round. God sits above them both. He is so great that people are as small as grasshoppers in comparison. The whole of the universe, the heavens and the earth, are as a tent to Him because He is so immense.