God created the heavens and the earth as a single entity before separating them. God made all living things from water and placed mountains and roads on earth to stabilize it and allow people to pass through safely. God made the sky a protective roof but people still reject the signs God placed in the sky like the sun, moon, and winds.

1. God’s Oneness
Have not those who disbelieve known that (21:30)
the heavens and the earth were joined
together as one united piece, then We parted (21:31)
them? And We have made from water every
living thing. Will they not then believe? And
(21:32)
We have placed on the earth firm mountains,
lest it should shake with them, and We
placed therein broad highways for them to
pass through, that they may be guided. And
We have made the heaven a roof, safe and
well guarded. Yet they turn away from its
signs (i.e. sun, moon, winds, clouds, etc.).
[21:30-32]