谁是我们的敌人？谁是我们的朋友？这个问题是革命的首要问题。中国过去一切革命斗争成效甚少，其基本原因就是因为不能团结真正的朋友，以攻击真正的敌人。革命党是群众的向导，在革命中未有革命党领错了路而革命不失败的。我们的革命要有不领错路和一定成功的把握，不可不注意团结我们的真正的朋友，以攻击我们的真正的敌人。我们要分辨真正的敌友，不可不将中国社会各阶级的经济地位及其对于革命的态度，作一个大概的分析。
Who are our enemies? Who are our friends? This is a question of the first importance for the revolution. The basic reason why all previous revolutionary struggles in China achieved so little was their failure to unite with real friends in order to attack real enemies. A revolutionary party is the guide of the masses, and no revolution ever succeeds when the revolutionary party leads them astray. To ensure that we will definitely achieve success in our revolution and will not lead the masses astray, we must pay attention to uniting with our real friends in order to attack our real enemies. To distinguish real friends from real enemies, we must make a general analysis of the economic status of the various classes in Chinese society and of their respective attitudes towards the revolution.
《中国社会各阶级的分析》（一九二六年三月），《毛泽东选集》第一卷第三页
"Analysis of the Classes in Chinese Society" (March 1926), Selected Works, Vol. I, p. 13.
