Nature is so wonderfully kind that if we go one-tenth of the way, she will help us the other nine-tenths. Indeed she seems to be watching and hoping for a place to get in, so quickly does she take possession of us, if we do but turn toward her ever so little. But instead of adopting her simple laws and following quietly her perfect way, we try by every artificial means to gain a rapid transit back to her dominion, and succeed only in getting farther away from her. Where is the use of taking medicines to give us new strength, while at the same time we are steadily disobeying the very laws from the observance of which alone the strength can come? No medicine can work in a man's-body while the man's habits are constantly counteracting it. More harm than good is done in the end. Where is the use of all the quieting medicines, if we only quiet our nerves in order that we may continue to misuse them without their crying out? They will cry out sooner or later; for Nature, who is so quick to help us to the true way of living, loses patience at last, and her punishments are justly severe. Or, we might better say, a law is fixed and immovable, and if we disobey and continue to disobey it, we suffer the consequences. III. REST IN SLEEP HOW do we misuse our nervous force? First, let us consider, When should the body be completely at rest? The longest and most perfect rest should be during sleep at night. In sleep we can accomplish nothing in the way of voluntary activity either of mind or body. Any nervous or muscular effort during sleep is not only useless but worse,--it is pure waste of fuel, and results in direct and irreparable harm. Realizing fully that sleep is meant for rest, that the only gain is rest, and that new power for use comes as a consequence,--how absurd it seems that we do not abandon ourselves completely to gaining all that Nature would give us through sleep. Suppose, instead of eating our dinner, we should throw the food out of the window, give it to the dogs, do anything with it but what Nature meant we should, and then wonder why we were not nourished, and why we suffered from faintness and want of strength. It would be no more senseless than the way in which most of us try to sleep now, and then wonder why we are not better rested from eight hours in bed. Only this matter of fatiguing sleep has crept upon us so slowly that we are blind to it. We disobey mechanically all the laws of Nature in sleep, simple as they are, and are so blinded by our own immediate and personal interests, that the habit of not resting when we sleep has grown to such an extent that to return to natural sleep, we must think, study, and practise.