Thought reflexes get conditioned very strongly, and they are very hard to change. And the also interfere. A reflex may connect to the endorphins and produce an impulse to hold that whole pattern forther. In other words, it produces a defensive reflex. Not merely is it stuck because it's chemically so well built up, but also there is a defensive reflex which defends against evidence which might weaken it. Thus it all happens, one reflex after another after another. It's just a vast system of reflexes. And they form a 'structure' as they get more rigid.
David BohmThen there is the further question of what is the relationship of thinking to reality. As careful attention shows, thought itself is in an actual process of movement. That is to say, one can feel a sense of flow in the stream of consciousness not dissimilar to the sense of flow in the movement of matter in general. May not thought itself thus be a part of reality as a whole? But then, what could it mean for one part of reality to 'know' another, and to what extent would this be possible?
David BohmThe question of relevance comes before that of truth, because to ask whether a statement is true or false presupposes that it is relevant (so that to try to assert the truth or falsity of an irrelevant statement is a form of confusion).
David Bohm