Date: 1947, 1958

"Religion, ethics, metaphysics – these are merely the 'spiritual' and 'inner' festivals of human anguish, ways of channelling the black waters of anxiety – and towards what abyss?"

— Lefebvre, Henri (1901-1991)

Date: 1949

"The mind is its own place and in his inner life each of us lives the life of a ghostly Robinson Crusoe."

— Ryle, Gilbert (1900-1976)

Date: 1952

De la partie la plus noire de mon âme, à travers la zone hachurée me monte ce désir d'être tout à coup blanc [Out of the blackest part of my soul, through the zone of hachures, surges up this desire to be suddenly white].

— Fanon, Frantz (1925-1961)

Date: 1971, 1979

"Thinking is trying to better one's instructions; it is trying out promissory tracks which will exist, if they ever do exist, only after one has stumbled exploringly over ground where they are not."

— Ryle, Gilbert (1900-1976)

Date: 1983

"Hume's account of mental happenings is geographical in the broadest sense, a description of human economy and ecology, not just a record of topography and a positioning of land masses but a marking of the tidal movements and trade routes of the mind as it negotiates for ease and stability."

— Richetti, John (b. 1938)