on a lifelong battle. At a much later period, in 1871, he gave the following account of his relations with Marx at this time:—
Marx was much more advanced than I was, as he remains to-day not more advanced but incomparably more learned than I am. I knew then nothing of political economy. I had not yet rid myself of metaphysical abstractions, and my Socialism was only instinctive. He, though younger than I, was already an atheist, an instructed materialist, a well-considered Socialist. It was just at this time that he elaborated the first foundations of his present system. We saw each other fairly often, for I respected him much for his learning and his passionate and serious devotion (always mixed, however, with personal vanity) to the cause of the proletariat, and I sought eagerly his conversation, which was always instructive and clever, when it was not inspired by a paltry hate, which, alas! happened only too often. But there was never any frank intimacy between as. Our temperaments would not suffer it. He called me a sentimental idealist, and he was right; I called him a vain man, perfidious and crafty, and I also was right.