One of purposes of life

Blessed be He in Whose Hand is the dominion; and He is Able to do all things. Who has created death and life that He may test you which of you is best in deed. And He is the Almighty, the Oft-Forgiving; Who has created the seven heavens one above the other; you can see no fault in the creation of the Most Gracious. Then look again. Can you see any rifts. Then look again and yet again, your sight will return to you humiliated, and worn out. (67:1-4)