People say: “One can’t help one’s thoughts.” But one can. The control of the thinking machine is perfectly possible. And since nothing whatever happens to us outside our own brain; since nothing hurts us or gives us pleasure except within the brain, the supreme importance of being able to control what goes on in that mysterious brain is patent. This idea is one of the oldest platitudes, but it is a platitude whose profound truth and urgency most people live and die without realising. People complain of the lack of power to concentrate, not witting that they may acquire the power, if they choose.

And without the power to concentrate — that is to say, without the power to dictate to the brain its task and to ensure obedience — true life is impossible. Mind control is the first element of a full existence.

Hence, it seems to me, the first business of the day should be to put the mind through its paces. You look after your body, inside and out; you run grave danger in hacking hairs off your skin; you employ a whole army of individuals, from the milkman to the pig-killer, to enable you to bribe your stomach into decent behaviour. Why not devote a little attention to the far more delicate machinery of the mind, especially as you will require no extraneous aid? It is for this portion of the art and craft of living that I have reserved the time from the moment of quitting your door to the moment of arriving at your office.

“What? I am to cultivate my mind in the street, on the platform, in the train, and in the crowded street again?” Precisely. Nothing simpler! No tools required! Not even a book. Nevertheless, the affair is not easy.

When you leave your house, concentrate your mind on a subject (no matter what, to begin with). You will not have gone ten yards before your mind has skipped away under your very eyes and is larking round the corner with another subject.

Bring it back by the scruff of the neck. Ere you have reached the station you will have brought it back about forty times. Do not despair. Continue. Keep it up. You will succeed. You cannot by any chance fail if you persevere. It is idle to pretend that your mind is incapable of concentration. Do you not remember that morning when you received a disquieting letter which demanded a very carefully-worded answer? How you kept your mind steadily on the subject of the answer, without a second’s intermission, until you reached your office; whereupon you instantly sat down and wrote the answer? That was a case in which you were ro............