Marx had the two qualities of a genius: he had an incomparable talent for dissecting a thing into its constituent parts, and he was past master at reconstituting the dissected object out of its parts, with all its different forms of development, and discovering their mutual inner relations. His demonstrations were not abstractions – which was the reproach made to him by economists who were themselves incapable of thinking; his method was not that of the geometrician who takes his definitions from the world around him but completely disregards reality in drawing his conclusions. Capital does not give isolated definitions or isolated formulas; it gives a series of most searching analyses which bring out the most evasive shades and the most elusive gradations.
Marx begins by stating the plain fact that the wealth of a society dominated by the capitalist mode of production presents itself as an enormous accumulation of commodities; the commodity, which is a concrete object, not a mathematical abstraction, is therefore the element, the cell, of capitalist wealth. Marx now seizes on the commodity, turns it over and over and inside out, and pries out of it one secret after another that official economists were not in the least aware of, although those secrets are more numerous and profound than all the mysteries of the Catholic religion. Having examined the commodity in all its aspects, considers it in its relations to its fellow commodity, in exchange. Then he goes on to its production and the historic prerequisites for its production. He considers the forms which commodities assume and shows how they pass from one to another, how one form is necessarily engendered by the other. He expounds the logical course of development of phenomena with such perfect art that one could think he had imagined it. And yet it is a product of reality, a reproduction of the actual dialectics of the commodity.
He never allowed anybody to put his books or papers in order – or rather in disorder. The disorder in which they lay was only apparent, everything was really in its intended place so that it was easy for him to lay his hand on the book or notebook he needed. Even during conversations he often paused to show in the book a quotation or figure he had just mentioned. He and his study were one: the books and papers in it were as much under his control as his own limbs.
Marx had no use for formal symmetry in the arrangement of his books: volumes of different sizes and pamphlets stood next to one another. He arranged them according to their contents, not their size. Books were tools for his mind, not articles of luxury. “They are my slaves and they must serve me as I will,” he used to say. He paid no heed to size or binding, quality of paper or type; he would turn down the corners of the pages, make pencil marks in the margin and underline whole lines. He never wrote on books, but sometimes he could not refrain from an exclamation or question mark when the author went too far.
There is no doubt that Capital reveals to us a mind of astonishing vigour and superior knowledge. But for me, as for all those who knew Marx intimately, neither Capital nor any other of his works shows all the magnitude of his genius or the extent of his knowledge. He was highly superior to his own works.