That is the ego which rises and sinks periodically. But you exist always. That which lies beyond the ego is consciousness - the Self.
Ramana MaharshiSee who is the doubter, who is the thinker. It is the ego. Hold it; the other thoughts will die away - the ego will be left pure. See the source from where the ego arises and abide in it. That is pure consciousness.
Ramana MaharshiMind is consciousness which has put on limitations. You are originally unlimited and perfect. Later you take on limitations and become the mind.
Ramana MaharshiYou are the witness of the three bodies: the gross, the subtle, and the causal, and of the three times: past, present and future, and also this void. In the story of the tenth man, when each of them counted and thought they were only nine, each one forgetting to count himself, there is a stage when they think one is missing and do not know who it is; and that corresponds to the void. We are so accustomed to the notion that all that we see around us is permanent and that we are this body, that when all this ceases to exist we imagine and fear that we also have ceased to exist.
Ramana Maharshi