什么是知识？自从有阶级的社会存在以来，世界上的知识只有两门，一门叫做生产斗争知识，一门叫做阶级斗争知识。自然科学、社会科学，就是这两门知识的结晶，哲学则是关于自然知识和社会知识的概括和总结。 - Mao Zedong

我们应当相信群众，我们应当相信党，这是两条根本的原理。如果怀疑这两条原理，那就什么事情也做不成了。

Subjectivism, sectarianism and stereotyped Party writing are no longer the dominant styles, but merely gusts of contrary wind, ill winds from the air-raid tunnels.

Between war and peace, the possibility of peace is greater. Currently the possibility of peace is greater than in the past. The strength of the socialist camp is greater than the past and the possibility of peace is greater than at the time of World War II. The Soviet Union is powerful and the national independence movement is our strong ally. The Western nations are not stable. The working class, a part of the bourgeoisie and the American people do not want war; therefore, the possibility of peace is greater than that of war. Nevertheless, there is also the possibility of war. There are the maniacs and imperialism wants to extricate itself from economic crises. The duration of atomic warfare today will be short, three instead of four years. We must be prepared. What should be done if war really comes? I want to discuss this problem. If there is war, we will fight. Let imperialism be swept clean and we will start construction again. Thereafter there will not be any more world war. Since a world war is possible, we must prepare for it. We must not spend our time napping. Do not be alarmed either if there should be war. It would merely mean getting people killed and we’ve seen people killed in war. Eliminating half of the population occurred several times in China’s history. The 50 million population in the time of Emperor Wu in the Han Dynasty was reduced to 10 million by the time of the Three Kingdoms, the two Chin Dynasties and the North and South Dynasties. The war lasted for decades and intermittently for several hundred years, from the Three Kingdoms to the North and South Dynasties. The Tang Dynasty began with a population of 20 million and did not reach 50 million until Emperor Xuan. And Lushan staged a revolt, and the country was divided into many states. It was not reunited until the Song Dynasty, some 100 or 200 years later, with a population of just over 10 million. I once discussed this with XX. I maintained that modern weapons were not as powerful as the big sword of China’s Guan Yunchang, but he did not agree with me. Not very many people were killed in the two World Wars, 10 million in the first and 20 million in the second, but we had 40 million killed in one war. So, how destructive were the big swords! We have no experience in atomic war. So, how many will be killed cannot be known. The best outcome may be that only half of the population is left and the second best may be only one-third. When 900 million are left out of 2.9 billion, several five-year plans can be developed for the total elimination of capitalism and for permanent peace. It is not a bad thing.