Changes in society are due chiefly to the development of the internal contradictions in society, that is, the contradiction between the productive forces and the relations of production, the contradiction between classes and the contradiction between the old and the new; it is the development of these contradictions that pushes society forward and gives the impetu6 for the suppression of the old society by the new.
Mao ZedongAfter the countrywide victory of the Chinese revolution and the solution of the land problem, two basic contradictions will still exist in China. The first is internal, that is, the contradiction between the working class and the bourgeoisie. The second is external, which is the contradiction between China and the imperialist countries. Consequently, after the victory of the people's democratic revolution, the state power of the people's republic under the leadership of the working class must not be weakened but must be strengthened.
Mao ZedongA revolution is not a dinner party, or writing an essay, or painting a picture, or doing embroidery. It cannot be so refined, so leisurely and gentle, so temperate, kind, courteous, restrained and magnanimous. A revolution is an insurrection, an act of violence by which one class overthrows another.
Mao Zedong