“Politics is the work of the Kshatriya and it is the virtues of the Kshatriya we must develop if we are to be morally fit for freedom.”

Source: "Evolutionary Socialism" (1899) https://www.marxists.org/reference/archive/bernstein/works/1899/evsoc/index.htm, Chapter III, The Tasks and Possibilities of Social Democracy

The Influence of Literature upon Society (1800), Pt. 2, ch. 5

Yet Another Effort, Frenchmen, If You Would Become Republicans
Philosophy in the Bedroom (1795)

1950s, Give Us the Ballot (1957)
Context: This is no day for the rabble-rouser, whether he be Negro or white. We must realize that we are grappling with the most weighty social problem of this nation, and in grappling with such a complex problem there is no place for misguided emotionalism. We must work passionately and unrelentingly for the goal of freedom, but we must be sure that our hands are clean in the struggle. We must never struggle with falsehood, hate, or malice. We must never become bitter. I know how we feel sometime. There is the danger that those of us who have been forced so long to stand amid the tragic midnight of oppression—those of us who have been trampled over, those of us who have been kicked about—there is the danger that we will become bitter. But if we will become bitter and indulge in hate campaigns, the new order which is emerging will be nothing but a duplication of the old order.

Section 9 : Ethical Outlook
Founding Address (1876), Life and Destiny (1913)
Context: Theologians often say that faith must come first, and that morality must be deduced from faith. We say that morality must come first, and faith, to those whose nature fits them to entertain it, will come out of the experience of a deepened moral life as its richest, choicest fruit.
Precisely because moral culture is the aim, we cannot be content merely to lift the mass of mankind above the grosser forms of evil. We must try to advance the cause of humanity by developing in ourselves, as well as in others, a higher type of manhood and womanhood than the past has known.
To aid in the evolution of a new conscience, to inject living streams of moral force into the dry veins of materialistic communities is our aim.
We seek to come into touch with the ultimate power in things, the ultimate peace in things, which yet, in any literal sense, we know well that we cannot know. We seek to become morally certain — that is, certain for moral purposes — of what is beyond the reach of demonstration. But our moral optimism must include the darkest facts that pessimism can point to, include them and transcend them.

Seventy faces: articles of faith (2002)

Quotation made in an article published in 1914. Strauss had refused to sign the Manifesto of German artists and intellectuals supporting the German role in the war. Other signatories included Strauss' friends and colleagues, such as Max Reinhardt, Richard Dehmel, Max Liebermann, Engelbert Humperdink and Felix Wiengartner. The original article quoting Strauss was by Richard Specht, and is quoted by Romain Rolland in his diary entry, found on page 160 of Richard Strauss and Romain Rolland, edited by Rollo Myers, Calder and boyars, London, 1989.
Other sources

Speech (11 December 2010), at official site of the Government of the Republic of Armenia http://www.gov.am/en/speeches/1/item/3114/
2010

Interview in Deia (1 September 2012)