“But failure is not a sign of weakness. It is a sign that you are alive and growing.”

As quoted in Sexuality and Gender (2002) by Christine R. Williams and Arlene Stein, p. 213
Context: The feminist line is, strippers and topless dancers are degraded, subordinated, and enslaved; they are victims, turned into objects by the display of their anatomy. But women are far from being victims — women rule; they are in total control … the feminist analysis of prostitution says that men are using money as power over women. I'd say, yes, that's all that men have. The money is a confession of weakness. They have to buy women's attention. It's not a sign of power; it's a sign of weakness.

Source: フェアリーテイル 31 講談社キャラクターズA [Fearī Teiru 31 Special Edition DVD Bundle]

De Vita Beata (On the Happy Life): cap. 3, line 4
Alternate translation: All cruelty springs from weakness. (translator unknown)
As quoted in Caxtoniana: A Series of Essays on Life, Literature, and Manners (1864), Harper & brothers, Sir Edward Bulwer-Lytton, p. 174 (in the essay The Sympathetic Temperment).
Moral Essays

Source: The Seven Dials Mystery

" Where is the Love? http://www.nytimes.com/2013/11/28/opinion/kristof-where-is-the-love.html?src=recg", New York Times, 27 November 2013

Source: Paddy Clarke Ha Ha Ha

The Collected Papers of Bertrand Russell: Contemplation and Action, 1902-1914, ed. Richard A. Rempel, Andrew Brink and Margaret Moran (Routledge, 1993, : Textual Notes, p. 555; also in Laurence J. Peter Quotations for our time (1978), p. 188
Attributed from posthumous publications
Context: Wherever one finds oneself inclined to bitterness, it is a sign of emotional failure: a larger heart, and a greater self-restraint, would put a calm autumnal sadness in the place of the instinctive outcry of pain.

Joining with Amnesty International in condemning the Russian authorities’ treatment of Pussy Riot, a Russian punk rock protest band. "Sting condemns Russia's treatment of Pussy Riot musicians ahead of Moscow concert" Amnesty International (25 July 2012) http://www.amnesty.org/en/news/sting-condemns-russias-treatment-pussy-riot-musicians-ahead-moscow-concert-2012-07-25