Journal Fragments
p. 81“Cabanis remarks that “Sensibility / may be compared to a fluid / the total quantity of which / is determined and which / wherever it flows more / abundantly in any one channel / is proportionably diminished / in the others.”
Fuller, Margaret. "Journal Fragments." Houghton Library, Harvard University.
Inferred Fuller attributes the remark explicitly to ‘Cabanis.’ The quoted passage matches the kind of physiological metaphor characteristic of Cabanis’s Rapports du physique et du moral de l’homme (On the Relations between the Physical and Moral Aspects of Man, 1802), in which he argues that the nervous system and sensibility are distributed across the body in such a way that heightened function in one region diminishes it in others.