“Should anarchists vote? ... For my part, like many anarchists, I think not. To vote is to take part in the organization of the false democracy that has been set up forcefully by the middle class. ... The political game can produce no important changes in our society and we must radically refuse to take part in it.”

About the Bolshevik revolution, as quoted in Peter Kropotkin : From Prince to Rebel (1990) by George Woodcock and Ivan Avakumovic, p. 428

Anarchism And Other Impediments To Anarchy (1985)
Context: Every organization has more in common with every other organization than it does with any of the unorganized. The anarchist critique of the state, if only the anarchists understood it, is but a special case of the critique of organization. And, at some level, even anarchist organizations sense this.
Anti-anarchists may well conclude that if there is to be hierarchy and coercion, let it be out in the open, clearly labeled as such. Unlike these pundits (the right-wing "libertarians", the minarchists, for instance) I stubbornly persist in my opposition to the state. But not because, as anarchists so often thoughtlessly declaim, the state is not "necessary". Ordinary people dismiss this anarchist assertion as ludicrous, and so they should. Obviously, in an industrialized class society like ours, the state is necessary. The point is that the state has created the conditions in which it is indeed necessary, by stripping individuals and face-to-face voluntary associations of their powers. More fundamentally, the state's underpinnings (work, moralism, industrial technology, hierarchic organizations) are not necessary but rather antithetical to the satisfactions of real needs and desires. Unfortunately, most brands of anarchism endorse all these premises yet balk at their logical conclusion: the state.
If there were no anarchists, the state would have had to invent them. We know that on several occasions it has done just that. We need anarchists unencumbered by anarchism. Then, and only then, we can begin to get serious about fomenting anarchy.

Twitter account, February 2019

Source: Anarchy and Christianity (1988), p. 19

"The Politics of Mass Strikes and Unions"; Collected Works 2 <!-- p. 465 -->
Context: The modern proletarian class doesn't carry out its struggle according to a plan set out in some book or theory; the modern workers' struggle is a part of history, a part of social progress, and in the middle of history, in the middle of progress, in the middle of the fight, we learn how we must fight... That's exactly what is laudable about it, that's exactly why this colossal piece of culture, within the modern workers' movement, is epoch-defining: that the great masses of the working people first forge from their own consciousness, from their own belief, and even from their own understanding the weapons of their own liberation.

Christopher Hibbert, as quoted in Benito Mussolini: The Rise and Fall of Il Duce (1965) p. 40
Undated

Order by the commissar for military affairs - on the murder of count Mirbach
How the Revolution Armed (1923)

Martin Meredith, "Our Votes, Our Guns: Robert Mugabe and the Tragedy of Zimbabwe".
Said in 1976 while a leading commander of the Zimbabwe African National Liberation Army
1970s

The Principles of Anarchism