Which case, and why?

The Ninth Key: That God is not a substance. He whose intellect has rusted is close to having his sight go blind, and the paths of knowledge grow dark for him. He then cannot tell the true from the false, right guidance from error, or light from darkness. So it was with the ignorant among the philosophers, who supposed that the Originator of the two worlds and all that is in them is a substance. They forgot the mark by which they themselves had characterised substance when they said: 'Substance is what subsists by itself, is one in number, and bears differences within itself.' Thus a substance varies at one time by blackness, at another by whiteness, at another by heat, and at another by cold. These ignorant ones have three options. They may affirm a difference that the Originator of the two worlds receives in His essence, so that its corruptness becomes plain to them, and God is exalted above being a locus of differences. Or they may admit their error in the definition of substance. Or they may declare the Originator of the two worlds beyond substantiality. Exalted is God above what they describe! And it is said to them: substances are bounded by one another, independent of one another, and receptive from one another. Whichever of these they assert of the Originator of the two worlds, a manifest contradiction binds them,