The Other Half: A Self Portrait http://books.google.com/books?id=4gg0AAAAMAAJ&q=%22In+time+of+war+all+countries+behave+equally+badly+because+the+power+of+action+is+handed+over+to+stupid+and+obstinate+men%22&pg=PA4#v=onepage (1977)
“It has been deduced from Hitler's great power over the masses that the Germans are an unusually suggestible race. But in all countries and at all times men have succumbed to the suggestive powers of unusual personalities, even if the wielders of those powers were not always good men in the Christian sense.”
Panzer Leader (1952), Ch. 13 : Leading Personalities of the Third Reich, p. 432
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Heinz Guderian 15
German general 1888–1954Related quotes

The New York Herald-Tribune Magazine (6 March 1938)
1930s

Source: Autosuggestion : My method (2014), Chapter I. The reality of auto-suggestion.

“Men of power have not time to read; yet men who do not read are unfit for power”
On Benjamin Disraeli, in his own book, 'Debts of Honour
1980s

The Education of Henry Adams (1907)
Context: The work of domestic progress is done by masses of mechanical power — steam, electric, furnace, or other — which have to be controlled by a score or two of individuals who have shown capacity to manage it. The work of internal government has become the task of controlling these men, who are socially as remote as heathen gods, alone worth knowing, but never known, and who could tell nothing of political value if one skinned them alive. Most of them have nothing to tell, but are forces as dumb as their dynamos, absorbed in the development or economy of power. They are trustees for the public, and whenever society assumes the property, it must confer on them that title; but the power will remain as before, whoever manages it, and will then control society without appeal, as it controls its stokers and pit-men. Modern politics is, at bottom, a struggle not of men but of forces. The men become every year more and more creatures of force, massed about central power-houses. The conflict is no longer between the men, but between the motors that drive the men, and the men tend to succumb to their own motive forces.

“The truth is that all men having power ought to be mistrusted.”
As paraphrased in The Great Quotations (1960) by George Seldes, p. 460; this paraphrase has for some time become the most widely quoted form of Madison's statement.
1780s, The Debates in the Federal Convention (1787)