The subject matter ought to be systematically organized from the standpoint of this principle. And the teaching should be so orientated that the boy or girl, after leaving school, will not be a semi-pacifist, a democrat or of something else of that kind, but a whole-hearted German. So that this national feeling be sincere from the very beginning, and not a mere pretence, the following fundamental and inflexible principle should be impressed on the young brain while it is yet malleable: The man who loves his nation can prove the sincerity of this sentiment only by being ready to make sacrifices for the nation's welfare. There is no such thing as a national sentiment which is directed towards personal interests. And there is no such thing as a nationalism that embraces only certain classes. Hurrahing proves nothing