I am not going to maintain that what I call Transposition is the only possible mode whereby a poorer medium can respond to a richer, but I claim that it is very hard to imagine any other. It is therefore, at the very least, not improbable that Transposition occurs whenever the higher reproduces itself in the lower. Thus, to digress for a moment, it seems to me very likely that the real relation between the mind and body is one of Transposition. We are certain that, in this like at any rate, thought is intimately connected with the brain. The theory that thought therefore is merely a movement in the brain is, in my opinion, nonsense, for if so, that theory itself would be merely a movement, an event among atoms, which may have speed and direction, but of which it would be meaningless to use the words “true” or “false.” We are driven then to some kind of correspondence. But if we assume a one-for-one correspondence, this means that we have to attribute an almost unbelievable complexity and variety to events in the brain. But I submit that a one-for-one relation is probably quite unnecessary. All our examples suggest that the brain can respond—in a sense, adequately and exquisitely respond—to the seemingly infinite variety of consciousness without providing one singly physical modification for each single modification of consciousness.
C. S. Lewis, The Weight of Glory, Transposition, pp. 63-4.