In all the senses various activities there behind it all. Without me none of the senses would give any kind of experience. So this consciousness is there when the senses are active. When the senses shut down and you go into dream land in the world of dreams consciousness is there. If we focus on these three points you will realize you are consciousness. Consciousness continues revealing the absence of everything. Since the mind is absent you cannot even think oh I am now watching absence that you cannot think because the thinking is also mind. This is the clue the pointer.