So what does pure consciousness mean?
A state of being that is unchanging, dispassionate, formless, and without attributes or qualities. It is known in Advaita Vedanta as "the fourth" (Turiya). You might find this explanation helpful:
Advaita posits three states of consciousness, namely waking (jagrat), dreaming (svapna), deep sleep (suṣupti), which are empirically experienced by human beings,[6][7] and correspond to the Three Bodies Doctrine:[8]
Turiya - Wikipedia
- The first state is the waking state, in which we are aware of our daily world.[9] This is the gross body.
- The second state is the dreaming mind. This is the subtle body.[9]
- The third state is the state of deep sleep. This is the causal body.[9]
Turiya - Wikipedia