“With faith and hope and courage we hold our heads erect and with dauntless spirit marshal the working class for the march from Capitalism to Socialism, from Slavery to Freedom, from Barbarism to Civilization.”

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Remembering Our Leaders: Mahadeo Govind Ranade by Pravina Bhim Sain

Republican News http://larkspirit.com/hungerstrikes/bios/sands.html, (16 December 1978)
Other writings
Context: I was only a working-class boy from a Nationalist ghetto, but it is repression that creates the revolutionary spirit of freedom. I shall not settle until I achieve liberation of my country, until Ireland becomes a sovereign, independent socialist republic.

5.4, Essential Works of Lenin (1966)
The State and Revolution (1917)

Source: Lectures on The Industrial Revolution in England (1884), p. 95

1930s, Die verfluchten Hakenkreuzler. Etwas zum Nachdenken (1932)

Speech to the Swedish Social Democratic Party congress in Stockholm (5 June 1952), quoted in The Times (6 June 1952), p. 5
Leader of the Opposition

Unser ganzes Elend kommt vom Mangel an Zivilcourage.
adapted translation: All our suffering comes from a deficiency to stand up for our beliefs.
explaining why he defected the Soviet Bloc, as quoted by Egon Vacek in Die Flucht des Atomforschers, Die Zeit, October 29, 1965, Nr. 44.

Source: Sanitary Economy (1850), p. 24
Context: The working-classes require leaders and wise heads from their own body—patriarchs, in the old acceptation of the term—to keep them right in moments of excitement. The causes of early death prevent the existence of such a class of men, sobered and wise from experience, in sufficient numbers to discipline the youthful and fiery spirits who, confident in their ignorance, plunge themselves and those depending on their exertions into ruin.

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ABC's of Communism