That is the ego which rises and sinks periodically. But you exist always. That which lies beyond the ego is consciousness - the Self.
Ramana MaharshiThe experience of not forgetting consciousness alone is the state of devotion which is the relationship of unfading real love, because the real knowledge of Self, which shines as the undivided supreme bliss itself, surges up as the nature of love. Love itself is the actual form of God. That is pure bliss. Call it pure bliss, God, Self, or what you will. That is devotion, that is realization and that is everything.
Ramana Maharshi