Entering space and time completely’ – or even partially, which may be as far as any of us ever get – means admitting defeat. It means letting your illusions die. You have to accept that there will always be too much to do; that you can’t avoid tough choices or make the world run at your preferred speed; that no experience, least of all close relationships with other human beings, can ever be guaranteed in advance to turn out painlessly and well – and that from a cosmic viewpoint, when it’s all over, it won’t have counted for very much anyway.