Matter has disappeared, they tell us, wishing from this to draw epistemological conclusions. But has thought remained? – we ask. If not, if with the disappearance of matter thought has also disappeared, if with the disappearance of the brain and nervous system ideas and sensations, too, have disappeared – then it follows that everything has disappeared, and your argument as a sample of “thought” (or lack of thought) has disappeared. But if thought has remained – if it is assumed that with the disappearance of matter, thought (idea, sensation, etc.) does not disappear, then you have surreptitiously gone over to the standpoint of philosophical idealism. And this always happens with people who wish, for the sake of “economy”, to conceive of motion without matter, for tacitly, by the very fact that they continue their argument, they are acknowledging the existence of thought after the disappearance of matter. This means that a very simple, or a very complex philosophical idealism is taken as a basis; a very simple one, if it is a case of frank solipsism (I exist, and the world is only my sensation): a very complex one, if instead of the thought, ideas and sensations of a living person, a dead abstraction is taken, that is, nobody’s thought, nobody’s idea, nobody’s sensation, but thought in general (the Absolute Idea, the Universal Will, etc.), sensation as an indeterminate “element”, the “psychical”, which is substituted for the whole of physical nature, etc., etc. Thousands of shades of varieties of philosophical idealism are possible and it is always possible to create a thousand and first shade; and to the author of this thousand and first little system (empirio-monism, for example) what distinguishes it from the rest may appear important. From the standpoint of materialism, however, these distinctions are absolutely unessential. What is essential is the point of departure. What is essential is that the attempt to think of motion without matter smuggles in thought divorced from matter – and that is philosophical idealism.
V.I.Lenin, Materialism and Empirio-Criticism: Critical Comments on a Reactionary Philosophy, 1908, Progress Publishers, Moscow, 1975, pp. 248-49
Part Four/To be continued…