"We are third force blind. Our perceptions, our thoughts, our feelings are all essentially dualistic. Our mental processes are almost entirely based on affirmation and negation, comparison of like with like, of like with unlike. Our feelings are dominated by the pleasure-pain principle. Attraction and aversion rule our affective lives. This does not mean that reality is itself dualistic, but that our limited perceptions, feelings and intellectual processes, dualistic in themselves, graft a false dualism upon the world."
The Triad by John G Bennett
George Gurdjieff said that we are Third force blind. A "force" as he used the term here is a stance or orientation towards the world. The "Third force" he spoke of was the Reconciling force which is an orientation of relationship and wholeness. Opposed thinking for instance is a way of perceiving & thinking which only sees one option at a time, and doesn't recognise the larger "whole" of which the opposites are arbitrary parts, and relatively arbitrary ones at that.