If the theistic god is conceived as the uncaused firstcause that is also an incorporeal mind, a conciousness outside of time and space then it cannot and does not exist. As a conciousness it would have existed without there being any time, space, matter or energy. Therefore at one point god could only be concious of it's own conciousness. This is impossibly incoherent as there is nothing external to this mind it cannot be confident of it's own existence. Taking humankind as an example, we are only aware of ourselves with reference to things or others around us. To assert otherwise is like saying conciousness is concious of conciousness is concious of conciousness...ad infinitum
"I still say a church steeple with a lightning rod on top shows a lack of confidence"...Doug McLeod.