Nothingness - Words used in A Course in Miracles

 As nothingness cannot be pictured, so there is no symbol for totality. Reality is ultimately known without a form, unpictured and unseen.   T-27.III.5:1,2.

Symbols which but represent ideas that cannot be must stand for empty space and nothingness. Yet nothingness and empty space can not be interference. What can interfere with the awareness of reality is the belief that there is something there.    T-27.III.2:6-8

That is why the conflict cannot ultimately be resolved until all the parts of the Sonship have returned. Only then can the meaning of wholeness in the true sense be understood. Any part of the Sonship can believe in error or incompleteness if he so chooses. However, if he does so, he is believing in the existence of nothingness.   T-2.VII.6:5-8.

Specialness is the idea of sin made real. Sin is impossible even to imagine without this base. For sin arose from it, out of nothingness; an evil flower with no roots at all.               T-24.II.3:1-3.

The body that is asked to be a god will be attacked, because its nothingness has not been recognized. And so it seems to be a thing with power in itself. As something, it can be perceived and thought to feel and act, and hold you in its grasp as prisoner to itself. ... And you will hate it for its littleness, unmindful that the failure does not lie in that it is not more than it should be, but only in your failure to perceive that it is nothing. Yet its nothingness is your salvation, … .   T-29.II.9:1-3,5,6.