I didn't quite get it. I thought it was supposed to be this authors thoughts on dying, and on being a human being, but is falls short. Part might be its a translation.
I thought this would be an autobiography of this distinguished writer, and parts of it are, but the bulk of the book consists of meditations and vignettes on time and the long view of history in the light of nuclear waste that (nearly impossibly) needs to be kept safe and secure for tens of thousands of years. Very philosophical and profound.