"There is a serious tendency towards capitalism among the well-to-do peasants. This tendency will become rampant if we in the slightest way neglect political work among the peasants during the co-operative movement and for a very long period after."

Introductory note to "A Resolute Struggle Must Be Waged Against the Tendency Towards Capitalism" (1955), The Socialist Upsurge in China's Countryside, Chinese ed., Vol. I.

"Communism is not love. Communism is a hammer which we use to crush the enemy."   --Mao Zedong, On Practice and Contradiction.

"The Communist party must control the guns."   This appears to be a reconstruction of "Our principle is that the Party commands the gun, and the gun must never be allowed to command the Party."
--"Problems of War and Strategy" (November 6, 1938), Selected Works, Vol. II, p. 224.

"A revolution is not a dinner party, or writing an essay, or painting a picture, or doing embroidery. It cannot be so refined, so leisurely and gentle, so temperate, kind, courteous, restrained and magnanimous. A revolution is an insurrection, an act of violence by which one class overthrows another."
                --"Report on an Investigation of the Peasant Movement in Hunan" (March 1927), Selected Works, Vol. I, p. 28.

Please look them up yourself from now on if I do not supply a source. I did that for 40+ years and I'm tired of it.