... At the next Congress in Brussels I shall personally deliver a knock-out blow to these Proudhonist jackasses.  I have managed the whole thing diplomatically and did not want to come out personally until my book was published and our Association had struck root. I will moreover give them a hiding in the Official Report of the General Council (despite all their efforts, the Parisian babblers could not prevent our re-election).  Meanwhile our Association has made great progress. The wretched Star, which wanted to ignore us entirely, has announced in a leading article published yesterday that we are more important than the Peace Congress.  Schulze-Delitzsch was not able to prevent his Workers Association in Berlin from joining us.  The scoundrels among the English trade unionists, who thought we went too far , now come running to us. In addition to the Courrier fran ais, the Libert of Girardin, the Si cle, the Mode, the Gazette de France, etc, have printed reports on our Congress. Things are moving. And in the next revolution, which is perhaps nearer than it appears, we (that is, you and I) will have this powerful engine in our hands. Compare this with the results of the operations conducted by Mazzini, etc, during the last thirty years! And moreover without any financial means! Considering the intrigues of the Proudhonists in Paris, the Mazzinis in Italy, the jealous Odgers,  Cremers  and Potters  in London, and the Schulze-Delitzschists and Lassalleans in Germany! We can be very well satisfied...
Marx-Engels Correspondence 1867