Have Light and Darkness A Common Earth or separate Earths?

And, again, if this Earth stretches unto the Earth of the Darkness, is it not the fact that, since it is beaten out and everywhere bordering upon it (i.e., the Darkness), it has all become one earth in the Domain of the Light, and in the Domain of the Darkness? And it is found that one earth supports them both. These are fine Gods and (eternal) Entities which are supported by one another! And if it is one, as also it is one, for it must be one, then either it is all dark [Cf. xcv. 7.] towards the Good and towards the Evil, or, again, it is luminous towards both. For it is impossible that the half of it towards [P. 96.] the Darkness is dark, and the half of it towards the Light is luminous, because its fixed nature will not allow it. For it is one in its Essence. Or a great gulf exists in the middle between these two Earths, and does not allow them to go forth to one another.