“You cannot buy the Revolution. You cannot make the Revolution. You can only be the Revolution. It is in your spirit or, it is nowhere.”

"omlets are not made without breaking eggs" first appeared in English in 1796. It is from the French, "on ne saurait faire d'omelette sans casser des œufs" (1742 and earlier), attributed to François de Charette.
In the context of the Soviet Union, Time magazine http://www.time.com/time/magazine/article/0,9171,753448-2,00.html attributes it to Lazar Kaganovich.
Walter Duranty associated with Stalin in the New York Times.
"But – to put it brutally – you can't make an omelette without breaking eggs, and the Bolshevist leaders are just as indifferent to the casualties that may be involved in their drive toward socialization as any General during the World War who ordered a costly attack in order to show his superiors that he and his division possessed the proper soldierly spirit. In fact, the Bolsheviki are more indifferent because they are animated by fanatical conviction."
Walter Duranty, Special Cable to The New York Times http://www.artukraine.com/old/famineart/duranty.htm, The New York Times, New York, March 31, 1933, page 13.
Misattributed
Variant: You can't make an omelette without breaking eggs.

Broadcast to the nation. November 5
Speeches, 1978

The Ballot or the Bullet (1964), Speech in Detroit, Michigan (12 April 1964)
Context: Historically, revolutions are bloody. Oh, yes, they are. They haven’t never had a bloodless revolution, or a nonviolent revolution. That don’t happen even in Hollywood. You don’t have a revolution in which you love your enemy, and you don’t have a revolution in which you are begging the system of exploitation to integrate you into it. Revolutions overturn systems. Revolutions destroy systems.

In p. 32
Quote, Memorable Quotes from Rajiv Gandhi and on Rajiv Gandhi

Original French: Citoyens, vouliez-vous une révolution sans révolution?
Réponse à J.- B. Louvet http://www.royet.org/nea1789-1794/archives/discours/robespierre_reponse_louvet.htm, a speech to the National Convention (5 November 1792)

The Paris Review interview (1984)
Context: The French Revolution liberated people from the power of the aristocrats. But the bourgeoisie that took over represented the exploitation of man by man, and had to be destroyed—as in the Russian Revolution, which then degenerated into totalitarianism, Stalinism, and genocide. The more you make revolutions, the worse it gets. Man is driven by evil instincts that are often stronger than moral laws … there is a higher order, but man can separate himself from it because he is free — which is what we have done. We have lost the sense of this higher order, and things will get worse and worse, culminating perhaps in a nuclear holocaust — the destruction predicted in the Apocalyptic texts. Only our apocalypse will be absurd and ridiculous because it will not be related to any transcendence. Modern man is a puppet, a jumping jack.

Source: Revolution for the Hell of It (1968), p. 188.

Che's Last Letter
Woodstock Nation (1969)