--From half a dime to a dime, according to the style of the place and the quality of the liquor,--said the young fellow whom they call John. You speak trivially, but not unwisely,--I said. Unless the will maintain a certain control over these movements, which it cannot stop, but can to some extent regulate, men are very apt to try to get at the machine by some indirect system of leverage or other. They clap on the brakes by means of opium; they change the maddening monotony of the rhythm by means of fermented liquors. It is because the brain is locked up and we cannot touch its movement directly, that we thrust these coarse tools in through any crevice, by which they may reach the interior, and so alter its rate of going for a while, and at last spoil the machine. Men who exercise chiefly those faculties of the mind which work independently of the will,--poets and artists, for instance, who follow their imagination in their creative moments, instead of keeping it in hand as your logicians and practical men do with their reasoning faculty,--such men are too apt to call in the mechanical appliances to help them govern their intellects. --He means they get drunk,--said the young fellow already alluded to by name. Do you think men of true genius are apt to indulge in the use of inebriating fluids? said the divinity-student. If you think you are strong enough to bear what I am going to say, --I replied,--I will talk to you about this. But mind, now, these are the things that some foolish people call DANGEROUS subjects, --as if these vices which burrow into people's souls, as the Guinea-worm burrows into the naked feet of West-Indian slaves, would be more mischievous when seen than out of sight. Now the true way to deal with those obstinate animals, which are a dozen feet long, some of them, and no bigger than a horse hair, is to get a piece of silk round their HEADS, and pull them out very cautiously. If you only break them off, they grow worse than ever, and sometimes kill the person who has the misfortune to harbor one of them. Whence it is plain that the first thing to do is to find out where the head lies.