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xxiv that Lenten season when Lacordaire was preaching in Lyons, proves that, though devoting himself with ardor to the study of economical problems, Proudhon had not lost his interest in questions of religious history. Among his writings on these questions, which he was unfortunately obliged to leave unfinished, we may mention a nearly completed history of the early Christian heresies, and of the struggle of Christianity against Cæsarism.

We have said that, in 1848, Proudhon recognized three masters. Having no knowledge of the German language, he could not have read the works of Hegel, which at that time had not been translated into French. It was Charles Grün, a German, who had come to France to study the various philosophical and socialistic systems, who gave him the substance of the Hegelian ideas. During the winter of 1844–45, Charles Grün had some long conversations with Proudhon, which determined, very decisively, not the ideas, which belonged exclusively to the bisontin thinker, but the form of the important work on which he labored after 1843, and which was published in 1846 by Guillaumin.

Hegel's great idea, which Proudhon appropriated, and which he demonstrates with wonderful ability in the “System of Economical Contradictions,” is as follows: Antinomy, that is, the existence of two laws or tendencies which are opposed to each other, is possible, not only with two different things, but with one and the same thing. Considered in their thesis, that is, in the law or tendency which created them, all the economical categories are rational,—competition, monopoly, the balance of trade, and property, as well as the division of labor, machinery, taxation, and credit. But, like communism