The unity of the bourgeoisie can be shaken only by the unity of the proletariat.

The imaginary flowers of religion adorn man's chains. Man must throw off the flowers, and also the chains.

Nothing is easier than to give Christian asceticism a Socialist tinge.

Natural science will in time incorporate into itself the science of man, just as the science of man will incorporate into itself natural science: there will be one science.

He who before was the money owner, now strides in front as capitalist; the possessor of labor-power follows as his laborer. The one with an air of importance, smirking, intent on business; the other hesitant, like one who is bringing his own hide to market and has nothing to expect but a hiding.

Free education for all children in public schools... Combination of education with industrial production

Social reforms are never carried out by the weakness of the strong; but always by the strength of the weak.