Then Watt said, Obscure keys may open simple locks, but simple keys obscure locks never. But Watt had hardly said this when he regretted having done so. But then it was too late, the words were said and could never be forgotten, never undone. But a little later he regretted them less. And a little later he did not regret them at all. And a little later they pleased him again, no less than when they had first sounded, so gentle, so cajoling, in his skull. And then again a little later he regretted them again, most bitterly. And so on.

– Beckett, Watt