Marxism comprises many principles, but in the final analysis they can all be brought back to a single sentence: it is right to rebel. - Mao Zedong

Discover the truth through practice, and again through practice verify and develop the truth. Start from perceptual knowledge and actively develop it into rational knowledge; then start from rational knowledge and actively guide revolutionary practice to change both the subjective and the objective world. Practice, knowledge, again practice, and again knowledge. This form repeats itself in endless cycles, and with each cycle the content of practice and knowledge rises to a higher level. Such is the whole of the dialectical-materialist theory of knowledge, and such is the dialectical-materialist theory of the unity of knowing and doing.

下定决心，不怕牺牲，排除万难，去争取胜利。

We should allow democratic personages to challenge us with opposing views and give them a free hand to criticize us. Otherwise we would be a little like the Kuomintang. The Kuomintang was mortally afraid of criticism and went in fear and trepidation each time the Political Council was in session. Criticisms from democratic personages can be of only two kinds, those that are wrong and those that are not. Criticisms that are not wrong can help remedy our shortcomings while wrong ones must be refuted. As for such types as Liang Shu-ming, Peng Yi-hu and Chang Nai-chi, if they want to fart, let them. That will be to our advantage, for everybody can judge whether the smell is good or foul, and through discussion the majority can be won over and these types isolated. If they want to create trouble, let them have their fill of it.