Consciousness runs straight through all states of being. This is proven by the fact that the cause of existence must be present in anything that exists or it would cease to exist. The diversities of life are the diversities that spring from the Final Cause.
When was consciousness at any time not present? Even if you could say that at this time or that consciousness was not present, there would have to be consciousness to observe non-consciousness.
We can still admit that individual objects were here and now gone, so this is still in accord with the statement that every “thing” is in a state of flux.
We can infer that there would have to be a fixed, unchanging observer that is conscious of all this flux. Conscious observation of “things”makes possible the illumnation of them. Therefore, consciousness is the unchanging cause of observable flux and must be fixed.
Remain still and validate this for yourself.