sion. This idea of association is quite fascinating when you begin to employ it in your memory exercises and work. And you will find many little methods of using it. But always use natural association, and avoid the temptation of endeavoring to tie your memory up with the red-tape of the artificial systems.
POINT VIII. Group your impressions.
This is but a form of association, but is very important. If you can arrange your bits of knowledge and fact into logical groups, you will always be master of your subject. By associating your knowledge with other knowledge along the same general lines, both by resemblances and by opposites, you will be able to find what you need just when you need it. Napoleon Bonaparte had a mind trained along these lines. He said that his memory was like a large case of small drawers and pigeon-holes, in which he filed his information according to its kind. In order to do this he used the methods mentioned in this book of comparing the new thing with the old ones, and then deciding into which group it naturally fitted. This is largely a matter of
