He looks at houses, chateaus, forests, and thinks about the countless generations who used to see those things and who are gone now; and he understands that everything he is seeing is oblivion; pure oblivion, the oblivion whose absolute state will soon be achieved, the moment he himself is gone. And again I think about the obvious idea (that astoundingly obvious idea) that everything that exists (nation, thought, music) can also not exist.