Modern man, in so far as he is still Cartesian (he is of course going far beyond Descartes in many respects), is a subject for whom his own self-awareness as a thinking, observing, measuring and estimating "self" is absolutely primary. It is for him the one indubitable "reality," and all truth starts here. The more he is able to develop his consciousness as a subject over against objects, the more he can understand things in their relations to him and one another, the more he can manipulate these objects for his own interests, but also, at the same time, the more he tends to isolate himself in his own subjective prison, to become a detached observer cut off from everything else in a kind of impenetrable alienated and transparent bubble which contains all reality in the form of purely subjective experience. Modern consciousness then tends to create this solipsistic bubble of awareness - an ego-self imprisoned in its own consciousness, isolated and out of touch with other such selves in so far as they are all "things" rather than persons.
Thomas Merton, Zen and the Birds of Appetite
cartesian, christianity, descartes, modern-consciousness, zen