We must believe and have faith that the Supreme Emanator – blessed be He and blessed be His Name – is One alone, unified in all respects. This means that He alone exists, and only He exists of necessity: there is simply none other. And He alone controls everything. That He alone is in control is an obvious inference from the first proposition – that He alone exists. Since He alone exists, He alone is in control. This means that every other being that exists now is contingent upon Him.
Nevertheless, the fact that He alone is in control is a separate item of faith. Otherwise the unbelievers might say that at first He may have been alone and that He chose to bring creatures into being. But they could argue that, nevertheless, as soon as He created independent creatures possessing their own will, it would be possible (were it not for the fact of His perfect unity) for these independent wills to set limits to His will. In other words, once He gave them free will, they became able to choose the opposite of His will.