In the last analysis, productivity of labour is the most important, the principal thing for the victory of the new social system.

No amount of political freedom will satisfy the hungry masses.

Only by abolishing private property in land and building cheap and hygienic dwellings can the housing problem be solved.

But democracy is by no means a limit one may not overstep; it is only one of the stages in the course of development from feudalism to capitalism, and from capitalism to Communism.

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.

Man’s consciousness not only reflects the objective world, but creates it.

Why should freedom of speech and freedom of press be allowed? Why should a government which is doing what it believes to be right allow itself to be criticized? It would not allow opposition by lethal weapons. Ideas are much more fatal things than guns. Why should any man be allowed to buy a printing press and disseminate pernicious opinions calculated to embarrass the government?