Perhaps the most fundamental principle is that enunciated by Fichte. "Each man," he says, "is a free being in a world of other free beings." Therefore his freedom is limited only by the freedom of the other free beings. That is, they must "divide the world amongst them." Stated in the form of a command he says again, "Restrict your freedom through the freedom of all other persons with whom you come in contact." This is a rule that even a three-year-old child can be made to understand, and it is astonishing with what readiness he will admit its justice. He call do anything he wants to, you explain to him, except bother other people. And, of course, the corollary follows that every one else can do whatever he pleases except to bother the child. [Sidenote: Rights of Others] This clear and simple doctrine can be driven home with amazing force, if you strictly respect the child's right as you require him to respect yours. You should neither allow any encroachments upon your own proper privileges, except so far as you explain that this is only a loving permission on your part, and not to be assumed as a precedent or to be demanded as a right; nor should you yourself encroach upon his privileges. If you do not expect him to interrupt you, you must not interrupt him. If you expect him to let you alone when you are busy, you must let hint alone when he is busy, that is, when he is hard at work playing. If you must call him away from his playing, give him warning, so that he may have time to put his small affairs in order before obeying your command. The more carefully you do this the more willing will be his response on the infrequent occasions when you must demand immediate attention. In some such fashion you teach the child to respect the rights of others by scrupulously respecting those rights to which he is most alive, namely, his own. The next step is to require him with you to think out the rights of others, and both of you together should shape your conduct so as to leave these rights unfringed. [Sidenote: The Child's Share in Ruling]