The impulse to write things down is a peculiarly com pulsive one, inexplicable to those who do not share it, useful only acciden tally, only secondarily, in the way that any compulsion tries to justify itself.

So the point of my keeping a notebook has never been, nor is it now, to have an accurate factual record of what I have been doing or thinking. That would be a different impulse entirely, an instinct for reality which I sometimes envy but do not possess.