If we control attention we control thought, and with the suggestible patient this principle depends upon the one just now considered. Hope and courage-breeding thoughts can replace despairing and fearful ones, but it will be only when attention is directed through interest or by will to new material. There is no blank in waking consciousness. The last thought or feeling or perception, through association of ideas, brings up a related one, and so on indefinitely. We may start with a pebble on the road and go on logically, smoothly, until in five minutes we are thinking of the coronation of King George, with no sense of anything at all unusual in the succession. It may be a very roundabout process, from "pebble" through "rough way," "ways that hurt," "dangerous ways," "brigands," "uncertainties of life." "Uncertain lies the head that wears a crown," "King George and his crown," "coronation." But this constant stream of thought can be broken into at any point by a spoken word, a passing vehicle, which diverts the mind's trend. So the nurse can take advantage of the mind's very suggestibility, and substitute for the unhappy and sickness breeding by turning attention to anything else of a happier color, and may divert the entire stream of thought in that direction. She who knows these simple laws of the mind, and who at all knows people, is a therapeutic agent of unlimited value. HABIT IS A CONSERVER OF EFFORT It is always easier to follow a beaten path than to break one's way through untrodden forests. It is easier to walk after we "learn how," and learning how is simply doing it over and over until the legs and feet have acquired habits of motion and accommodation to distances and to what is underfoot. It is easy to do anything after we have done it again and again, so that it has become second-nature, and "second-nature" is habit. The wise man early forms certain habits of personal care, of eating, sleeping, exercising; of study, of meeting the usual occurrences of life. The first day he spent at anything new was a hard one. Nothing was done naturally. Active attention had to be keenly held to each detail. He had to learn where things belonged, how to do this and that for the first time, how to work with his associates.