“It is easy to romanticise, say, tigers or lions and cats. We admire their magnificent beauty, strength and agility. But we would regard their notional human counterparts as wanton psychopaths of the worst kind.”

Source: The Savage Detectives

The Reader's Digest, Volume 121 (1982), p. 118.
Attributed

Ibid.
The Book of Disquiet
Original: A força sem a destreza é uma simples massa.

To the Right Reverend J. Bouvier, Bishop of Le Mans, Saint Mary-of-the-Woods, 1850-07-10.

Source: Nation

"Sir W. Churchill on 'a great Englishman'", The Times, 5 November 1953, p. 5
Winston Churchill's remarks on unveiling a bust of Bevin in the Foreign Office.

from the 1986 song "I Know It's Over"
From songs

The Yosemite http://www.sierraclub.org/john_muir_exhibit/writings/the_yosemite/ (1912), chapter 15: Hetch Hetchy Valley
1910s

Amoureux et jaloux de la liberté humaine, et la considérant comme la condition absolue de tout ce que nous adorons et respectons dans l'humanité, je retourne la phrase de Voltaire, et je dis : Si Dieu existait réellement, il faudrait le faire disparaître.
Source: God and the State (1871; publ. 1882), Ch. II; Variants or variant translations of this statement have also been attributed to Bakunin:
The first revolt is against the supreme tyranny of theology, of the phantom of God. As long as we have a master in heaven, we will be slaves on earth.
A boss in Heaven is the best excuse for a boss on earth, therefore If God did exist, he would have to be abolished.