Authors:

Some people have read a few Marxist books and think themselves quite learned but what they have read has not penetrated, has not struck root in their minds, so that they do not know how to use it and their class feelings remain as of old. Others are very conceited and having learned some book-phrases, think them terrific and are very cocky; but whenever a storm blows up, they take a stand very different from that of the workers and the majority of the peasants. They waver while the latter stand firm, they equivocate while the latter are forthright.

Zedong Mao (1967). “Speech at the Chinese Communist Party's National Conference on Propaganda Work: March 12, 1957”
Some people have read a few Marxist books and think themselves quite learned but what they have read has not penetrated, has not struck root in their minds, so that they do not know how to use it and their class