That is the ego which rises and sinks periodically. But you exist always. That which lies beyond the ego is consciousness - the Self.
Ramana MaharshiThere is neither past nor future. There is only the present. Yesterday was the present to you when you experienced it, and tomorrow will be also the present when you experience it. Therefore, experience takes place only in the present, and beyond experience nothing exists.
Ramana MaharshiOur identification with the mind and body is the chief reason for our failure to know our self as we truly are.
Ramana Maharshi...Bliss is not something to be got. On the other hand you are always Bliss. This desire [for Bliss] is born of the sense of incompleteness. To whom is this sense of incompleteness? Enquire. In deep sleep you were blissful. Now you are not so. What has interposed between that Bliss and this non-bliss? It is the ego. Seek its source and find you are Bliss.
Ramana Maharshi