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.

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.