As soon as the will has got the upper hand of the brain--as soon as it can say to the brain, with a fair certainty of being obeyed: 'Do this. Think along these lines, and continue to do so without wandering until I give you leave to stop'--then is the time arrived when the perfecting of the human machine may be undertaken in a large and comprehensive spirit, as a city council undertakes the purification and reconstruction of a city. The tremendous possibilities of an obedient brain will be perceived immediately we begin to reflect upon what we mean by our 'character.' Now, a person's character is, and can be, nothing else but the total result of his habits of thought. A person is benevolent because he habitually thinks benevolently. A person is idle because his thoughts dwell habitually on the instant pleasures of idleness. It is true that everybody is born with certain predispositions, and that these predispositions influence very strongly the early formation of habits of thought. But the fact remains that the character is built by long-continued habits of thought. If the mature edifice of character usually shows in an exaggerated form the peculiarities of the original predisposition, this merely indicates a probability that the slow erection of the edifice has proceeded at haphazard, and that reason has not presided over it. A child may be born with a tendency to bent shoulders. If nothing is done, if on the contrary he becomes a clerk and abhors gymnastics, his shoulders will develop an excessive roundness, entirely through habit. Whereas, if his will, guided by his reason, had compelled the formation of a corrective physical habit, his shoulders might have been, if not quite straight, nearly so. Thus a physical habit! The same with a mental habit. The more closely we examine the development of original predispositions, the more clearly we shall see that this development is not inevitable, is not a process which works itself out independently according to mysterious, ruthless laws which we cannot understand. For instance, the effect of an original predisposition may be destroyed by an accidental shock. A young man with an inherited tendency to alcohol may develop into a stern teetotaller through the shock caused by seeing his drunken father strike his mother; whereas, if his father had chanced to be affectionate in drink, the son might have ended in the gutter. No ruthless law here! It is notorious, also, that natures are sometimes completely changed in their development by chance momentary contact with natures stronger than themselves. 'From that day I resolved--' etc. You know the phrase. Often the resolve is not kept; but often it is kept. A spark has inflamed the will. The burning will has tyrannised over the brain. New habits have been formed. And the result looks just like a miracle.