Also, when you are young, you think you can predict the likely pains and bleaknesses that age might bring. You imagine yourself being lonely, divorced, widowed; children growing away from you, friends dying. You imagine the loss of status, the loss of desire – and desirability. You may go further and consider your own approaching death, which, despite what company you may muster, can only be faced alone. But all this is looking ahead. What you fail to do is look ahead, and then imagine yourself looking back from the future point. Learning the new emotions that time brings. Discovering, for example, that as the witnesses to your life diminish, there is less corroboration, and therefore less certainty, as to what you are or have been. Even if you have assiduously kept records – in words, sound, pictures – you may find that you have attended to the wrong kind of record-keeping. What was the line Adrian used to quote? 'History is that certainty produced at the point where the imperfections of memory meet the inadequacies of documentation.

Julian Barnes