Propaganda must be limited to a few simple themes and these must be represented again and again. Here, as in innumerable other cases, perseverance is the first and most important condition of success.

No amount of genius spent on the creation of propaganda will lead to success if a fundamental principle is not forever kept in mind. Propaganda must confine itself to very few points, and repeat them endlessly. Here, as with so many things in this world, persistence is the first and foremost condition of success.