Opposition and struggle between ideas of different kinds constantly occur within the Party; this is a reflection within the Party of contradictions b… - Mao Zedong

The subjective forces of the revolution have indeed been greatly weakened since the defeat of the revolution in 1927. The remaining forces are very small and those comrades who judge by appearances alone naturally feel pessimistic. But if we judge by essentials, it is quite another story. Here we can apply the old Chinese saying, “A single spark can start a prairie fire.” In other words, our forces, although small at present, will grow very rapidly. In the conditions prevailing in China, their growth is not only possible but indeed inevitable, as the May 30th Movement and the Great Revolution which followed have fully proved. When we look at a thing, we must examine its essence and treat its appearance merely as an usher at the threshold, and once we cross the threshold, we must grasp the essence of the thing; this is the only reliable and scientific method of analysis.

Who are our enemies and who are our friends? This is the first and foremost question of a revolution and it is also the first and foremost question of the great Cultural Revolution.

A person goes from a primary school of this kind all the way through to a university of the same kind, graduates and is reckoned to have a stock of learning. But all he has is book-learning; he has not yet taken part in any practical activities or applied what he has learned to any field of life. Can such a person be regarded as a completely developed intellectual? Hardly so, in my opinion, because his knowledge is still incomplete. What then is relatively complete knowledge? All relatively complete knowledge is formed in two stages: the first stage is perceptual knowledge, the second is rational knowledge, the latter being the development of the former to a higher stage. What sort of knowledge is the students' book-learning? Even supposing all their knowledge is truth, it is still not knowledge acquired through their own personal experience, but consists of theories set down by their predecessors in summarizing experience of the struggle for production and of the class struggle. It is entirely necessary that students should acquire this kind of knowledge, but it must be understood that as far as they are concerned such knowledge is in a sense still one-sided, something which has been verified by others but not yet by themselves. What is most important is to be good at applying this knowledge in life and in practice. Therefore, I advise those who have only book-learning but as yet no contact with reality, and also those with little practical experience, to realize their own shortcomings and become a little more modest.