ATTENTION is the instrumentality through which the Laws of Recall operate. Wit-tingly or unwittingly, consciously or unconsciously, every man's attention swings in automatic obedience to the Laws of Recall.

Attention is the artisan that, bit by bit, and with lightning quickness, constructs the mosaic of consciousness.

Having the whole vast store of all present and past experiences to draw upon, he selects only those groups and those isolated instances that are related to our general interests and aims. He disregards others.

The attention operates in a manner complementary to the general Laws of Recall. It is an active principle not of association, but of dissociation.

You choose, for example, a certain aim in life. You decide to become the inventor of an aeroplane of automatic stability. This choice henceforth determines two things. First, it determines just which of the sensory experiences of any given moment are most likely to be selected for your conscious perception. Secondly, it determines just which of your past experiences will be most likely to be recalled.

Such a choice, in other words, determines to some extent the sort of elements that will most probably be selected to make up at any moment the contents of your consciousness.

From the instant that you make such a choice you are on the alert for facts relevant to the subject of your ambition. Upon them you concentrate your attention. They are presented to your consciousness with greater precision and clearness than other facts. All facts that pertain to the art of flying henceforth cluster and cling to your conscious memory like iron filings to a magnet. All that are impertinent to this main pursuit are dissociated from these intensely active complexes, and in time fade into subconscious forgetfulness.

By subconscious forgetfulness we mean a compartment, as it were, of that reservoir in which all past experiences are stored.

Consciousness is a momentary thing. It is a passing state. It is ephemeral and flitting. It is made up in part of present sense-impressions and in part of past experiences. These past experiences are brought forth from subconsciousness. Some are voluntarily brought forth, Some present themselves without out conscious volition, but by the operation of the laws of association and dissociation. Some we seem unable voluntarily to recall, yet they may appear when least we are expecting them. It is these last to which we have referred as lost in subconscious forgetfulness. As a matter of fact, none are ever actually lost.

All the wealth of your past experience is still yours - a concrete part of your personality. All that is required to make it available for your present use is a sufficient concentration of your attention, a concentration of attention that shall dwell persistently and ex-clusively upon those associations that bear upon the fact desired.

The tendency of the mind toward dissociation, a function limiting the indiscriminate recall of associated "groups," is also manifested in all of us in the transfer to unconsciousness of many muscular activities.

As infants we learn to walk only by giving to every movement of the limbs the most deliberate conscious attention. Yet, in time, the complicated co-operation of muscular movements involved in walking becomes involuntary and unconscious, so that we are no longer even aware of them.

It is the same with reading, writing, playing upon musical instruments, the manipulation of all sorts of mechanical devices, the thousand and one other muscular activities that become what we call habitual.

The moment one tries to make these habitual activities again dependent on the conscious will he encounters difficulties.

"The centipede was happy quite, Until the toad, for fun, Said, 'Pray which leg goes after which?' This stirred his mind to such a pitch, He lay distracted in a ditch, Considering how to run."

All these habitual activities are started as acts of painstaking care and conscious attention. All ultimately become unconscious. They may, however, be started or stopped at will. They are, therefore, still related to the conscious mind. They occupy a semi-automatic middle ground between conscious and subconscious activities.