He had created the earth and ordained within it its sustenances for the sake of the generators, so He made it a treasury for their sustenances. We have mentioned the order of the creation of the world in the book of Uqlah al-Mustafuz, and from the determination of its sustenances was the presence of water, air, and fire, and what is in that of vapors, clouds, lightnings, thunders, and overhead effects, and that is the decree of the Mighty, the Knowing, and His creation. The jinn of fire, the birds, the land and sea animals, and the insects of the earth’s rots, in order to purify the air for us from the vapors of the rots, which if they mixed with the air in which God placed the life and well-being of this human and animal, would have been sick, sick, and crippled. So He cleared the air for him, Glory be to Him, out of His kindness by creating these rots, so diseases and ailments were reduced. < /p >