After a certain period of mental discipline, of deliberate habit-forming and habit-breaking, such as I have been indicating, a man will begin to acquire at any rate a superficial knowledge, a nodding acquaintance, with that wonderful and mysterious affair, his brain, and he will also begin to perceive how important a factor in daily life is the control of his brain. He will assuredly be surprised at the miracles which lie between his collar and his hat, in that queer box that he calls his head. For the effects that can be accomplished¹ by mere² steady, persistent³ thinking must appear to be miracles to apprentices⁴ in the practice of thought. When once a man, having passed an unhappy day because his clumsy, negligent⁵ brain forgot to control his instincts at a critical moment, has said to his brain: 'I will force you, by concentrating you on that particular point, to act efficiently⁶ the next time similar circumstances arise,' and when he has carried out his intention, and when the awkward circumstances have recurred⁷, and his brain, disciplined, has done its work, and so prevented unhappiness—then that man will regard his brain with a new eye. 'By Jove!' he will say; 'I've stopped one source of unhappiness, anyway. There was a time when I should have made a fool of myself in a little domestic crisis such as to-day's. But I have gone safely through it. I am all right. She is all right. The atmosphere is not dangerous with undischarged electricity! And all because my brain, being in proper condition, watched firmly over my instincts! I must keep this up.' He will peer into that brain more and more. He will see more and more of its possibilities. He will have a new and a supreme⁸ interest in life. A garden is a fairly interesting thing. But the cultivation⁹ of a garden is as dull as cold mutton compared to the cultivation of a brain; and wet weather won't interfere¹⁰ with digging, planting, and pruning¹¹ in the box.  
In due season the man whose hobby is his brain will gradually settle down into a daily routine, with which routine he will start the day. The idea at the back of the mind of the ordinary man (by the ordinary man I mean the man whose brain is not his hobby) is almost always this: 'There are several things at present hanging over me—worries, unfulfilled ambitions, unrealised desires. As soon as these things are definitely settled, then I shall begin to live and enjoy myself.' That is the ordinary man's usual idea. He has it from his youth to his old age. He is invariably waiting for something to happen before he really begins to live. I am sure that if you are an ordinary man (of course, you aren't, I know) you will admit that this is true of you; you exist in the hope that one day things will be sufficiently¹² smoothed out for you to begin to live. That is just where you differ from the man whose brain is his hobby. His daily routine consists in a meditation¹³ in the following vein¹⁴: 'This day is before me. The circumstances of this day are my environment; they are the material out of which, by means of my brain, I have to live and be happy and to refrain from causing unhappiness in other people. It is the business of my brain to make use of this material. My brain is in its box for that sole purpose. Not to-morrow! Not next year! Not when I have made my fortune! Not when my sick child is out of danger! Not when my wife has returned to her senses! Not when my salary is raised! Not when I have passed that examination! Not when my indigestion is better! But now! To-day, exactly as to-day is! The facts of to-day, which in my unregeneracy I regarded primarily as anxieties, nuisances, impediments, I now regard as so much raw material from which my brain has to weave a tissue of life that is comely<............