I think there is some truth to this concept, and so it is from Islam. Among the textual evidences are the hadith where the Prophet said (I am paraphrasing from memory) "The truest words ever spoken by a poet are the words of Libid who said 'All beside Allah is illusion'" and the verse in Surah Rahman which says all will be destroyed except the Essence of God. But at the same I think we should also have some intellectual humility and realize that the limited human mind cannot fully comprehend God. So I do not believe that He is a form sitting on a throne bound by space and time. I do believe that He is beyond form, beyond conceptualization, but how exactly is this is so, what exactly is He is, this is a realm my mind cannot enter even though it believes in Him with the utmost certainty.