in the preface to miller’s book is a quote from samuel taylor coleridge:
what if you slept? and what if, in your sleep, you dreamed?  and what if, in your dream, you went to heaven and there plucked a strange and beautiful flower?  and what if, when you awoke, you had that flower in your hand?  ah, what then?
the author identifies “the promise that many near-death researchers claim to fulfill - a glimpse into eternity, verified by corroborating evidence.”  miller addresses this question.