党内不同思想的对立和斗争是经常发生的，这是社会的阶级矛盾和新旧事物的矛盾在党内的反映。党内如果没有矛盾和解决矛盾的思想斗争，党的生命也就停止了。 - Mao Zedong

对民主人士，我们要让他们唱对台戏，放手让他们批评。如果我们不这样做，就有点象国民党了。国民党很怕批评，每次开参政会就诚惶诚恐。民主人士的批评也无非是两种：一种是错的，一种是不错的。不错的可以补足我们的短处；错的要反驳。至于梁漱溟、彭一湖、章乃器那一类人，他们有屁就让他们放，放出来有利，让大家闻一闻，是香的还是臭的，经过讨论，争取多数，使他们孤立起来。他们要闹，就让他们闹够。

According to materialist dialectics, changes in nature are due chiefly to the development of the internal contradictions in nature. Changes in society are due chiefly to the development of the internal contradictions in society, that is, the contradiction between the productive forces and the relations of production, the contradiction between classes and the contradiction between the old and the new; it is the development of these contradictions that pushes society forward and gives the impetus for the supersession of the old society by the new. Does materialist dialectics exclude external causes? Not at all. It holds that external causes are the condition of change and internal causes are the basis of change, and that external causes become operative through internal causes. In a suitable temperature an egg changes into a chicken, but no temperature can change a stone into a chicken, because each has a different basis. There is constant interaction between the peoples of different countries. In the era of capitalism, and especially in the era of imperialism and proletarian revolution, the interaction and mutual impact of different countries in the political, economic and cultural spheres are extremely great. The October Socialist Revolution ushered in a new epoch in world history as well as in Russian history. It exerted influence on internal changes in the other countries in the world and, similarly and in a particularly profound way, on internal changes in China. These changes, however, were effected through the inner laws of development of these countries, China included. In battle, one army is victorious and the other is defeated, both the victory and the defeat are determined by internal causes.

If the U.S. monopoly capitalist groups persist in pushing their policies of aggression and war, the day is bound to come when they will be hanged by the people of the whole world. The same fate awaits the accomplices of the United States.