says: “The permanence of the impression which anything leaves on the memory, is proportionate to the degree of attention which was originally given to it.” Thompson says: “The experiences most permanently impressed upon consciousness are those upon which the greatest amount of attention has been fixed.” Beattie says: “The force wherewith anything strikes the mind is generally in proportion to the degree of attention bestowed upon it. The great art of memory is attention. . . . Inattentive people have always bad memories.” Kay says: “It is generally held by philosophers that without some degree of attention no impression of any duration could be made on the mind, or laid up in the memory.” Hamilton says: “It is a law of the mind that the intensity of the present consciousness determines the vivacity of the future memory; memory and consciousness are thus in the direct ratio of each other. Vivid consciousness, long memory; faint consciousness, short memory; no consciousness, no memory. . . . An act of attention, that is an act of concentration,
