For us, Marxism is always open because there are always new experiences, there are always new facts, including facts about the past, which have to be incorporated in the corpus of scientific socialism.
Ernest MandelPrecisely because Marx was convinced that the cause of the proletariat was of decisive importance for the whole future of mankind, he wanted to create for that cause not a flimsy platform of rhetorical invective or wishful thinking, but the rock-like foundation of scientific truth.
Ernest MandelThere are no conditions in which we subordinate the interests of the class as a whole to the interests of any sect, any chapel, any separate organization.
Ernest Mandel