And it came in The Treatise of the Gold Ingot (Risalat al-Sabikah):

"If the physical form were fixed in reality, then the one whom Cain killed would have been Abel himself in his absolute essence.

And it came in The Refutative Treatise (al-Raddadiyyah):

"The Creator merely displays a form that is seen; thus, the form is a cause operating within creation, not within Him. If the Creator were in His Essence truly an individualized person, then the eyes and hearts of His creation would not have shifted or transformed; rather, He would be the one undergoing transformation."

And it came in The Refutative Treatise as well:

"Verily, whosoever says, 'The Creator occupies a fleshly, bloody human form that speaks and from which He speaks,' has driven his soul into impossibility and arrived in the realm of denial."

And Sheikh Abd al-Hadi Haydar, Allah sanctified his secret, said: "The term 'form' was only applied to Him due to its outward resemblance to physical forms; and that is our own spiritual cause which showed us Allah, glorified is He, eating and drinking."