State and revolution-Lenin
Scientific socialism vs utopian socialism- Engels
In what relations do the Communists stand to the proletarians as a whole? The Communists do not form a separate party opposed to other working class parties. They have no interests separate and apart from those of the proletariat as a whole. They do not set up any sectarian principles of their own, by which to shape and mould the proletarian movement.
-Karl Marx
It is only by strengthening ourselves ideologically, inculcating in ourselves the values and ideals of the struggle and building up the ranks of the revolutionary party that we will make it.
- Ta Power