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 ZedongThe comrades throughout the Party must take all this fully into account and be prepared to overcome all difficulties with an indomitable will and in a planned way. The reactionary forces and we both have difficulties. But the difficulties of the reactionary forces are insurmountable because they are forces on the verge of death and have no future. Our difficulties can be overcome because we are new and rising forces and have a bright future.
Mao ZedongThe enemy advances, we retreat; the enemy camps, we harass; the enemy tires, we attack; the enemy retreats, we pursue
Mao ZedongAt certain times in the revolutionary struggle, the difficulties outweigh the favorable conditions and so constitute the principal aspect of the contradiction and the favorable conditions constitute the secondary aspect. But through their efforts the revolutionaries can overcome the difficulties step by step and open up a favorable new situation, thus a difficult situation yields place to a favorable one.
Mao ZedongThe People's Liberation Army is always a fighting force. Even after countrywide victory, our army will remain a fighting force during the historical period in which classes have not been abolished in our country and the imperialist system still exists in the world. On this point, there should be no misunderstanding or wavering.
Mao Zedong