The word "habit" suggests nearly always, unfortunately, the thought of bad habits, just as the word "passion" implies, with many people, evil tendencies. But it must not be forgotten that there are good passions and good habits that are as helpful for the accomplishment of what is best in life as bad passions and bad habits are harmful. A repetition of acts is needed for the formation of good habits just as for the establishment of customs of evil. Usually, however, and this must not be forgotten, the beginning of a good habit is easier than the beginning of a bad habit. Once formed, the good habits are even more beneficial than the bad habits are harmful. It is almost as hard to break a good habit as a bad one, provided that it has been continued for a sufficient length of time to make that groove in the nervous system which underlies all habit. We cannot avoid forming habits and the question is, shall we form good or bad habits? Good habits preserve health, make life easier and happier; bad habits have the opposite effect, though {50} there is some countervailing personal element that tempts to their formation and persistence. Every failure to do what we should has its unfortunate effect upon us. We get into a state in which it is extremely difficult for us to do the right things. We have to overcome not only the original inertia of nature, but also a contrary habit. If we do not follow our good impulses, the worse ones get the upper hand. As Professor James said, for we must always recur to him when we want to have the clear expression of many of these ideas: "Just as, if we let our emotions evaporate, they get into a way of evaporating; so there is reason to suppose that if we often flinch from making an effort, before we know it the effort-making capacity will be gone; and that, if we suffer the wandering of our attention, presently it will wander all the time. Attention and effort are but two names for the same psychic fact. To what brain-processes they correspond we do not know. The strongest reason for believing that they do depend on brain processes at all and are not pure acts of the spirit, is just this fact, that they seem in some degree subject to the law of habit, which is a material law." It must not be forgotten that we mold not {51} alone what we call character, but that we manifestly produce effects upon our tissues that are lasting. Indeed it is these that count the most, for health at least. It is the physical basis of will and intellect that is grooved by what we call habit. As Doctor Carpenter says: "Our nervous systems have grown to the way in which they have been exercised, just as a sheet of paper or a coat, once creased or folded, tends to fall forever afterwards into the same identical fold."