“He who cannot hate the devil cannot love God.”
Wer den Teufel nicht hassen kann, der kann auch Gott nicht lieben.
Michael: a German fate in diary notes (1926)
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Joseph Goebbels 145
Nazi politician and Propaganda Minister 1897–1945Related quotes
“For men love what they cannot have, and hate what they cannot control.”
Source: The Secret Diary of Anne Boleyn
In Lugalbanda in the Mountain Cave, Ur III Period (21st century BCE). http://etcsl.orinst.ox.ac.uk/cgi-bin/etcsl.cgi?text=t.1.8.2.1#

“Even the devils love their own kind and, they cannot be evil to themselves.”

'Where Do We Go From Here?" as published in Where Do We Go from Here : Chaos or Community? (1967), p. 62; many statements in this book, or slight variants of them, were also part of his address Where Do We Go From Here?" which has a section below. A common variant appearing at least as early as 1968 has "Returning violence for violence multiplies violence..." An early version of the speech as published in A Martin Luther King Treasury (1964), p. 173, has : "Returning hate for hate multiplies hate..."
1960s
Source: A Testament of Hope: The Essential Writings and Speeches
Context: The ultimate weakness of violence is that it is a descending spiral, begetting the very thing it seeks to destroy. Instead of diminishing evil, it multiplies it. Through violence you may murder the liar, but you cannot murder the lie, nor establish the truth. Through violence you may murder the hater, but you do not murder hate. In fact, violence merely increases hate. So it goes. … Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that.

“God exists since mathematics is consistent, and the Devil exists since we cannot prove it.”
As quoted in Mathematical Circles Adieu (Boston 1977) by H Eves

“If the devil cannot make us bad, he will make us busy.”

1992 Democratic National Convention. http://www.nytimes.com/1992/07/16/news/under-big-top-excerpts-remarks-delivered-tsongas-brown-convention.html
“We cannot love our own people unless we hate those who consciously destroy our kind.”
Race to Extinction
Focus Fourteen