Whenever the _thou shalt not_ side of religion is mentioned the girls themselves and those responsible for their training immediately think of the question of amusements, which is after all only a part of the greater question of how much leisure a girl should have and what she should do with it. Preachers, teachers and Christians generally, differ so widely on the matter of disputed amusement questions that _thou shalt not_ loses its force. It is the parents' right to decide the girl's amusements and determine her social life and when one sees the length to which parents permit and even encourage their daughters to go, he knows that the _thou shalt not_ might well be said to _them_. When parents do not care what their girls do, or are too careless and ignorant to realize danger, when the girls are without friends and unprotected, then the teacher of religion must without hesitation, forcefully and with the arguments of _fact_, teach them to say "no" to the things which she believes can bring only harm, which weaken the power to resist other evils and which are unhealthy for the growing girl. One may teach with feeling and power the "_thou shalt not_" in which she believes without uttering bitter words of condemnation of those who differ with her. Religion and the law together have the right to say to the unprotected girl, lacking wisdom, without discretion, eager for fun and adventure, ignorant of danger, _thou shall not_. The words should be written over every unchaperoned or inadequately chaperoned high school dance, over the public dance hall, over the cabaret, over the vaudeville where the vulgar hides behind a mask, over every place which by its very nature opens doors of temptation and lowers powers of resistance. The teachers of religion, and all agencies for moral training and uplift, _because_ of the comparative helplessness of girlhood, have the right to teach by every means at their command _thou shalt not_. Some one must teach the growing girl that extravagance is sin; some one must say _thou shalt not_ to her common faults of promising without thought of the cost of keeping the promise, of exaggeration and untruthfulness. Some one must help her see the utter folly of snobbishness and false pride. In some way she must be taught the cruelty and meanness of gossip, the results of a sharp tongue and a critical spirit. She must be shown the sin of ingratitude and the curse of jealousy and envy. In fact the old ten commandments are needed by the girlhood of today as truly as they were needed by that great army of people in the days of the youth of a race, when their great law giver and leader strove to save them from the results of their own ignorance and newly acquired liberty.