
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.
Shéi shì wǒmen de dírén? Shéi shì wǒmen de péngyǒu? Zhège wèntí shì gémìng de shǒuyào wèntí.
Chapter 2 https://www.marxists.org/reference/archive/mao/works/red-book/ch02.htm, originally published in Analysis of the Classes in Chinese Society (March 1926), Selected Works, Vol. I, p. 1.
Quotations from Chairman Mao Zedong (The Little Red Book)