It is necessary to master Marxist theory and apply it, master it for the sole purpose of applying it. If you can apply the Marxist-Leninist viewpoint in elucidating one or two practical problems, you should be commended and credited with some achievement.
Mao ZedongHow is Marxist-Leninist theory to be linked with the practice of the Chinese revolution? To use a common expression, it is by "shooting the arrow at the target". As the arrow is to the target, so is Marxism-Leninism to the Chinese revolution. Some comrades, however, are "shooting without a target", shooting at random, and such people are liable to harm the revolution.
Mao ZedongThe ruthless economic exploitation and political oppression of the peasants by the landlord class forced them into numerous uprisings against its rule.... It was the class struggles of the peasants, the peasant uprisings and peasant wars that constituted the real motive force of historical development in Chinese feudal society.
Mao Zedong