For our party and for our party tactics there is but one valid basis: the basis of the class struggle, out of which the Social Democratic party has s… - Wilhelm Liebknecht

The purity of our principles, the idealism of our struggle, these are factors of strengthening and drawing power that have given to us courage for all our battles, and have given to our doctrines an irresistible attraction for all who feel themselves oppressed and have a sense of honor.

The proletariat stands politically as well as socially in the most abrupt contradiction to the present class state. It must fight it on all fields and upon every question, both of domestic and of foreign policy.

What is it that has made of us in Germany the pivotal part? ... It is the avalanche-like increase of our supporters that gradually, with the certainty of a natural law, or more correctly of a natural force, grows from tens of thousands to hundreds of thousands, and from hundreds of thousands to millions, and is daily increasing, bidding defiance to our opponents and driving them into impotent rage. And this avalanche-like increase has come, and is coming, as a consequence of our opposition to and struggle with all other parties.