Capitalists are no more capable of self-sacrifice than a man is capable of lifting himself up by his own bootstraps.

No Marxist can deny that the interests of socialism are higher than the interests of the right of nations to self-determination.

The Jewish bourgeoisie are our enemies, not as Jews but as bourgeoisie. The Jewish worker is our brother.

Without revolutionary theory there can be no revolutionary movement.

We would be deceiving both ourselves and the people if we concealed from the masses the necessity of a desperate, bloody war of extermination, as the immediate task of the coming revolutionary action.

To picture world history as advancing smoothly and steadily without sometimes taking gigantic strides backward is undialectical, unscientific and theoretically wrong.

The reflection of nature in man's thought must be understood not lifelessly but in the eternal process of movement, the arising of contradictions and their solution.