That is why I have given a detailed account of this period. There, in Vienna, stark reality taught me the truths that now form the fundamental principles of the Party which within the course of five years has grown from modest beginnings to a great mass movement. I do not know what my attitude towards Jewry, Social-Democracy, or rather Marxism in general, to the social problem, etc., would be to-day if I had not acquired a stock of personal beliefs at such an early age, by dint of hard study and under the duress of Fate.