The purpose of propaganda is not to provide interesting distraction for blasé young gentlemen, but to convince... the masses. But the masses are slow moving, and they always require a certain time before they are ready even to notice a thing, and only after the simplest ideas are repeated thousands of times will the masses finally remember them.

Mein Kampf (ed. Houghton Mifflin Harcourt, 1998) - ISBN: 9780395951057