Adolf Hitler Quote
But the most brilliant propagandist technique will yield no success unless one fundamental principle is borne in mind constantly and with unflagging attention. It must confine itself to a few points and repeat them over and over. Here, as so often in this world, persistence is the first and most important requirement for success.
Mein Kampf (ed. Houghton Mifflin Harcourt, 1998) - ISBN: 9780395951057