II. The Logic of Thought and the Logic of Reality

But in Mach and Avenarius—you will not misunderstand my words—all this takes place entirely within the limit of thoroughly “respectable” thinking. We should naturally assume that these two men and all their followers are worthy folk of sound middle-class opinion, utterly removed from any even moderately radical, let alone revolutionary ideas, in practice. And now all of a sudden they have become the official Philosophers of the Bolsheviks! No one could have dreamt of such a thing. Perhaps you may read Avenarius' booklet on the “Principle of Least Action.” It may interest you, it is quite well written. But if you were to tackle his “Philosophy of Experience,” I fancy you would not get very far, you would find it appallingly dull. Written as it is in an absolutely professorial style, there is not the slightest possibility of your drawing even the least vestige of Bolshevism as a conclusion from it. You would not even derive from it a practical world-conception of the most gentle radicalism.