There is nothing arbitrary about anything God does.
“And now, comprehend the meaning of this verse: “The whole earth shall on the Resurrection Day be but His handful, and in His right hand shall the heavens be folded together……
In like manner, reflect how the elevated heavens of the Dispensations of the past have, in the right hand of power, been folded together, how the heavens of divine Revelation have been raised by the command of God, and been adorned by the sun, the moon, and stars of His wondrous commandments.”
The Kitáb-i-Íqán, pp. 48-49