The miracle of life is cruelly circumscribed by birth and death. Of the immense aeons, the abyss of years before and after our own brief lives, we directly experience nothing. Consciousness that blesses humans with knowledge of a past also curses us with awareness of time’s awesome duration beyond our own evanescence. Why, asked Arthur Schopenhauer, should we lament our future non-existence any more than our absence from pre-natal eras?4 Some indeed do mourn both: viewing home movies filmed a few weeks before his birth, Vladimir Nabokov was appalled by the rich reality of this past he had not shared and where nobody had missed him. A brand-new empty baby carriage had ‘the smug, encroaching air of a coffin . . . as if, in the reverse order of things, his very bones had disintegrated’. Defying the prison of time present, he strove ‘to steal into realms that existed before I was conceived’.