"Unity of the masses, the Party and the whole country is essential. At the same time, criticism may take place along comradely lines, while at the same time a basic unity is felt and preserved. This is the dialectical method.
Marxist dialectical materialism, which connotes the constant struggle between opposites in an empirical setting, is the best method toward constant improvement. Objective analysis of problems based on empirical results is at a premium. Criticism is a part of the Marxist dialectical method which is central to Party improvement; as such, communists must not fear it, but engage in it openly.Cadres, the instrument for uniting with and working for the people, must be leaders versed in Marxist-Leninism. They must have both guidance and the freedom to use their creative inititave in solving problems. Newer cadres and older cadres must work together with a comradely respect, learning from each other".
- Mao Zedong