Hitler had the willpower of a demon and he needed it. If he didn't have such a strong willpower he couldn't have achieved anything. Don't forget, if Hitler had not lost the war, if he did not have to fight against the combination of big powers like England, America, and Russia — each one he could have conquered individually — these defendants and these generals would now be saying, 'Heil Hitler,' and would not be so damn critical.

To Leon Goldensohn (24 May 1946) - The Nuremberg Interviews (2004)