The more modest the scientific tenor of this propaganda and the more it is addressed exclusively to public sentiment, the more decisive will be its success. This is the best test of the value of a propaganda, and not the approbation of a small group of intellectuals or artistic people.

The art of propaganda consists precisely in being able to awaken the imagination of the public through an appeal to their feelings, in finding the appropriate psychological form that will arrest the attention and appeal to the hearts of the national masses. That this is not understood by those among us whose wits are supposed to have been sharpened to the highest pitch is only another proof of their vanity or mental inertia.