Why did God Rest on the 7th Day? // Why did God Create the World?

Why did God rest on the seventh day?

God's rest from his work points toward the completion of creation, which is beyond all human efforts.

Although man in his work is the junior partner of his Creator (Gen 2:15), he can by no means redeem the world by his toil. The goal of creation is "new heavens and a new earth" (Is 65:17) through a redemption that is given to us as a gift. Thus the Sunday rest, which is a foretaste of heavenly rest, is superior to the work that prepares us for it.

Why did God create the world?

"The world was made for the glory of God" (First Vatican Council).

There is no other reason for creation than love. In it God's glory and honor appears. To praise God, therefore, does not mean applauding the Creator. After all, man is not a spectator to the work of creation. For him, "praising" God means being grateful for his own existence together with all creation. (YOUCAT questions 47-48)