We must not neglect to consider the very close relation that exists between the health of the body and the health of the spirit. A strong will, showing itself in ability to concentrate its efforts on a chosen purpose, is not to be expected in a child whose muscles are flabby and whose nerves quickly tire. Since the will expresses itself in action, it can be best cultivated in a body capable of vigorous action. The young child is not only a bundle of bones and muscles; it is also a bundle of impulses. And some of these impulses lead to actions that are quite desirable, while others lead to actions that are indifferent, and still others to actions that are decidedly undesirable. But, so far as the child is concerned, he has no means of discriminating between one kind of impulse and another. He would just as soon carry poison to his mouth as good food; he would rather grasp at a flame than at a harmless rattle. One of the essentials then becomes suitable knowledge. As the child grows older he should gradually learn that knowledge is necessary to wise choice. It is not so much the knowledge of what is commonly called "good" or "evil" as the knowledge of relations and needs that will enable him to choose ends, and to choose effective means toward those ends. Yet we cannot begin too early to have such considerations as "It is right," or "It is best," rather than "I want it," influence the conduct of our children. But, in order to do the right, we have to _know_ the right, and the children who get these moral lessons in their homes are fortunate indeed. It is here the child should acquire his feeling of loyalty to duty, for such lessons learned in the home are the most impressive and the most enduring. We must also make certain that children all through their lives at home are given opportunity for choice and decision. In this matter of making decisions there is a great deal of individual variation, and even distinct types of persons have been described, according to the way they reach decisions. At one extreme is the child--or the grown person--who apparently without any effort balances the reasons that may be given on the opposite sides of a problem, and makes his choice solely on the strength of the reasoned argument. Herbert Spencer tells in his Autobiography how, when a young man, he wrote down, as in a ledger, all the advantages and all the disadvantages he could think of in regard to the married state. After checking off the items on the two sides of the account, he found a balance in favor of remaining single. Later in life he had his doubts as to whether the decision was a wise one, but it was the best he could make under the circumstances, for he made use of all the knowledge at his command and stood by his reasoned decision.