Is everything fixed?

 The body lives and dies one cell at a time. Our mind thinks one thought at a time. We feel one feeling at a time. We notice one thing at a time.  Our time is fixed our body is bordered. Our possibilities seem endless. The Universe is forever, the Universes Universe incomprehendable. Our emotions can overwhelm us. Or body over take us. Yet we think we die? Our body continues to grow even if within another and another out into time.  Are there are more grians of sand than stars or thoughts in our minds. Are there universes within universes? Universes outside our Universe, None ending and intertwined. You say there is no God? There is everything in our minds.