PS: Actually the affirmation I've attributed to W.R.Bion is originally Sigmund Freud's ("consciousness as the sense organ for the apprehension of psychic quality", chapter VII of The Interpretation of Dreams)

Nabokov's lines, that brought this assertion to my mind, are from his lecture on Doestoevsky, are:"the brain, that stomach of the soul."* 

Both sentences are equally intriguing to me...

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* - "Let me submit the following practical suggestion. Literature, real literature, must not be gulped like some potion which may be good for the heart or good for the brain-the brain, that stomach of the soul. Literature must be taken and broken to bits, pulled apart, squashed-then its lovely reek will be smelt in the hollow of the palm, it will be munched and rolled upon the tongue with relish; then, only then, its rare flavour will be appreciated at its true worth and the broken and crushed parts will again come together in your mind and disclose the beauty of a unity to which you have contributed something of your own blood".