Regarding this third rule whereby the subconsciousness is made to work for you, Charles Leland has the following to say, although he uses it to illustrate another point: "As I understand it, it is a kind of impulse or projection of will into the coming work. I may here illustrate this with a curious fact in physics. If the reader wished to ring a doorbell so as to produce as much sound as possible, he would probably pull it as far back as he could, and then let it go. But if he would, in letting it go, simply give it a tap with his forefinger, he would actually redouble the sound. Or, to shoot an arrow as far as possible, it is not enough to _merely_ draw the bow to its utmost span or tension. If, just as it goes, you will give the bow a quick push, though the effort be trifling, the arrow will fly almost as far again as it would have done without it. Or, if, as is well known in wielding a very sharp sabre, we make the draw cut; that is, if to the blow or chop, as with an axe, we also add a certain slight pull, simultaneously, we can cut through a silk handkerchief or a sheep. Forethought (command to the subconsciousness) is the tap on the bell; the push on the bow; the draw on the sabre. It is the deliberate but yet rapid action of the mind when before dismissing thought, we bid the mind to consequently respond. It is more than merely thinking what we are to do; it is the bidding or ordering the Self to fulfill a task before willing it." Remember first, last and always, that before you can remember, or recollect, you must first _perceive_; and that perception is possible only through attention, and responds in degree to the latter. Therefore, it has truly been said that: "The great Art of Memory is Attention." CHAPTER VII. ASSOCIATION.