“The simplest, but also the most effective response, to those who show you no respect is total indifference.”

Original: La vendetta più severa, audace ed efficace è l’eterna indifferenza.
Source: prevale.net

Original: Il silenzio è la risposta più efficace per togliere l'attenzione a chi cerca solo il conflitto e non la comprensione.
Source: prevale.net

Carr, Act I
Source: Travesties (1974)

Quoted in Supreme Command : Soldiers, Statesmen, and Leadership in Wartime (2002) by Eliot A. Cohen, p. 172

Remarks by German Chancellor Angela Merkel before a joint session of Congress on November 04, 2009. http://www.spiegel.de/international/europe/0,1518,659196,00.html
Dokumentation: Angela Merkels Rede im US-Kongress im Wortlaut http://www.welt.de/politik/ausland/article5079678/Angela-Merkels-Rede-im-US-Kongress-im-Wortlaut.html
Context: Even after the end of the Cold War we are […] faced with the task of tearing down the walls between different concepts of life, in other words the walls in people's minds that make it difficult time and again to understand one another in this world of ours. This is why the ability to show tolerance is so important. While, for us, our way of life is the best possible way, others do not necessarily feel that way. There are different ways to create peaceful coexistence. Tolerance means showing respect for other people's history, traditions, religion and cultural identity. But let there be no misunderstanding: Tolerance does not mean "anything goes". There must be zero tolerance towards all those who show no respect for the inalienable rights of the individual and who violate human rights.

The Ethics of Belief (1877), The Limits Of Inference
Context: A little reflection will show us that every belief, even the simplest and most fundamental, goes beyond experience when regarded as a guide to our actions. … Even the fundamental "I am," which cannot be doubted, is no guide to action until it takes to itself "I shall be," which goes beyond experience. The question is not, therefore, "May we believe what goes beyond experience?" for this is involved in the very nature of belief; but "How far and in what manner may we add to our experience in forming our beliefs?"

Nahj al-Balagha

Formulation of the principle of least action, as stated in Mémoires de l'académie royale des sciences (Accord between different laws of Nature that seemed incompatible), 1748, 417-426 (15 April 1744).

Source: Pedagogia do oprimido (Pedagogy of the Oppressed) (1968, English trans. 1970), Chapter 1