Source: The Responsible Self: An Essay in Christian Moral Philosophy (1963), p. 61
“Only one thing could have stopped our movement – if our adversaries had understood its principle and from the first day smashed with the utmost brutality the nucleus of our new movement.”
Only partially true. The full quote:
Only one danger could have jeopardised this development – if our adversaries had understood its principle, established a clear understanding of these ideas, and not offered any resistance. Or, alternatively, if they had from the first day annihilated with the utmost brutality the nucleus of our new movement.
He thought that if his adversaries had ignored the ‘weakest’ elements of his movement, they would harm the party. See zuriz https://zuriz.wordpress.com/2013/10/06/smashing-the-nucleus/ for more.
Misattributed
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Adolf Hitler 265
Führer and Reich Chancellor of Germany, Leader of the Nazi … 1889–1945Related quotes

2010s, 2016, January, Speech at (18 January 2016)

Page 18.
New Age Politics: Our Only Real Alternative (2015)

Nobel Peace prize acceptance speech (1985)
Context: I am convinced that today is a great and exciting day not only for the members of our international movement but also for all physicians on our planet, irrespective of their political and religious beliefs. For the first time in history, their selfless service for the cause of maintaining life on Earth is marked by the high Nobel Prize. True to the Hippocratic Oath, we cannot keep silent knowing what final epidemic-nuclear war — can bring to humankind. The bell of Hiroshima rings in our hearts not as a funeral knell, but as an alarm bell calling out to actions to protect life on our planet.
We were among the first to demolish the nuclear illusions that existed and to unveil the true face of nuclear weapons — the weapons of genocide. We warned the peoples and governments that medicine would be helpless to offer even minimal relief to the hundreds of millions of victims of nuclear war.
However, our contacts with patients inspire our faith in the human reason. Peoples are heedful of the voice of physicians who warn them of the danger and recommend the means of prevention.

Attributed by Jack Kirby in The Forever People #3, National Periodical Publications, (June-July 1971).
Disputed
Walter Robinson. " Joe Lewis: Clairvoynace http://www.artnet.com/magazineus/features/robinson/robinson8-16-07.asp" at artnet.com, 2015.

“Our own great movement will grow with its own impetus wherever it is not blighted.”
Source: The Flame is Green (1971), Ch. 9 : Oh, The Steep Roofs of Paris
Context: Listen now to a series of sayings that always come hard to brave people. Our own great movement will grow with its own impetus wherever it is not blighted. We will break up persons of blight and centers of blight. But often, and this will be the hard part for all of you to understand, we will warn and advise before we kill. And quite often we will not kill at all. Try to understand this.

Quote c. 1915, in: 'Cubofuturism', Malevich, in his Essays on Art, op. cit., vol 2; as quoted in Futurism, ed. By Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 59
1910 - 1920

December 6, 2014, Gloria Allred: The Battle Over Sexual Assault is the ‘Civil Rights Movement of Our Time’, May 15, 2014, Time magazine, Gloria Allred http://time.com/100055/campus-sexual-assault-gloria-allred/,