II. The Logic of Thought and the Logic of Reality

And, truth to tell, my dear friends, if you had told Avenarius and Mach that their philosophy was to be accepted by such people as the Bolsheviks, they themselves would have been still more astonished and angry than Berdiayeff. They would have been most indignant (both of them, as you know, are now dead) if they had lived to see themselves as the official philosophers of Bolshevism. Imagine Avenarius, the worthy bourgeois, who of course had always assumed that he could only be understood by people who—well, who wore at any rate decent clothes, people who would never do violence to anyone in the Bolshevist manner, in short, good “respectable” people, in the sense in which one used the expression in the sixties, seventies and eighties. And it is true, if we consider only the content of the philosophy of Avenarius, we are still more at a loss to understand how it happened. For what does Avenarius think? Avenarius says: Men labor under a prejudice. They think: within, in my head, or in my soul or wherever it is, are the ideas, the perceptions, they are there subjectively; outside are the objects. But, says Avenarius, this is not correct. If I were all alone in the world, I should never arrive at the distinction between subject and object. I am led to make the distinction only through the fact that other people are there too. I alone beheld a table, I should never come to the idea that the table is out there in space and a picture of it here in my brain. I would simply have the table, and would not distinguish between subject and object. I only distinguish between them because, when I look at the table with another man, I say to myself: He sees the table, and I too perceive it. The perception is in my head too. I reflect that what he senses I am also sensing. Such are partly theoretical considerations (I will not go into them more fully, you would say: All these things do not interest us) within which Avenarius' thought lives and moves. In 1876 he wrote his book Conception of the World According to the Principle of Least Action. For on such premises as I have here explained to you, he shows how the concepts we have as human beings have no real value, but that we only create them for the sake of mental economy. According to Avenarius, the concept “Lion,” for example, or the concept that finds expression in a “Natural Law” is nothing real, nor does it refer to anything real. It is only uneconomical if in the course of my life I have seen five or six or even thirty lions and am now to conceive them each and severally. I therefore proceed in a more economical way, and make myself a single concept “Lion,” embracing all the thirty. Thus all our forming of concepts is a mere matter of subjective mental economy.