God had to make "not-God"

I hear from Jewish and Islamic perspectives that God is infinite and has to create; even create his negation – the not-God – the realm of illusions or appearances which we know so well. Seyyed Hossein Nasr said it so well when he wrote: "Since the One God is Infinite and Absolute as well as the Infinitely Good, He could not but create. His infinitude implies that He contains within Himself all possibilities, including that of negating Himself, and this possibility had to be realized in the form of creation. Moreover, as St. Augustine also stated, it is in the nature of the good to give of itself, and the Infinitely-Good could not but radiate the reality that constitutes the world and, in fact, all the worlds."*

*The Heart of Islam. HarperSanFrancisco, 2002. page 9.