We photographers deal in things which are continually vanishing, and when they have vanished there is no contrivance on earth can make them come back again. We cannot develop and print a memory.
Your memory is a monster; you forget - it doesn't. It simply files things away. It keeps things for you, or hides things from you - and summons them to your recall with a will of its own. You think you have a memory; but it has you!