Who coverest thyself with light as with a garment. Light was the first thing created (Genesis 1:3), before either the heaven (Genesis 1:6-8) or the earth (Genesis 1:9, Genesis 1:10). In light God, the invisible, as it were, enshrouds himself, making it the image of his hidden glory.
Who stretchest out the heavens like a curtain; or, "a canopy" (comp. Isaiah 40:22; Isaiah 42:5; Isaiah 44:25). The metaphor is taken from the stretching out or "spreading out" of a tent (see Isaiah 40:22).