Ah, but you are mistaken, my friend. For you react to your task today differently because of the thing which you learned and have "forgotten." Your mind works differently because of what you disregarded then. "You" have forgotten it, but your brain-cells, your nerve-cells have not; and you are not quite the same person you would be without that forgotten experience, or that pressing stimulus, which you never consciously recognized, but allowed your subconsciousness to accept. Some night you have a strange, incomprehensible dream. You cannot find its source, but it is merely the re-enacting of some past sensation or experience of your own, fantastically arrayed. Some day you stop short in your hurried walk with a feeling of compulsion which you cannot resist. You know no reason for it, but some association with this particular spot, or some vague resemblance, haunts you. You cannot "place" it. One day you hit the tennis-ball at a little different angle than you planned because a queer thought came unbidden and directed your attention aside. Again, under terrific stress, with sick body and aching nerves, you go on and do your stint almost mechanically. You do not know where the strength or the skill is derived. But your unconscious or subconscious--as you will--has asserted itself, has usurped the place of the sick conscious, and enabled you automatically to go on. For we react to the storehouse of the unconscious even as we do to the conscious. Remember that the unconscious is simply the latent conscious--what once was conscious and may be again, but is now buried out of sight. The mind may be likened to a great sea upon which there are visible a few islands. The islands represent the conscious thoughts--that consciousness we use to calculate, to map out our plans, to form our judgments. This is the mind that for centuries was accepted as all the mind. But we know that the islands are merely the tops of huge mountain-ranges formed by the floor of the sea in mighty, permanent upheaval; that as this sea-floor rises high above its customary level and thrusts its bulk above the waters into the atmosphere, is the island possible.