living in dreams

This was a strange one.  My son was back with us even though he is dead, but not as a ghost or a zombie, but for real, only as a child and temporarily.  That was understood, that it was a temporary reprieve from death. Still, it wasn't desperate or sad.  Isn't this how it really is?  We're living on borrowed time.  If only we knew it with certainty.  I knew it in the dream.