"Our thinking is inconsistent with what we actually see. The eye is a perfect, natural organ. The seen image is a reaction phenomenon. Using an artificial optical apparatus, the same effect, for example, can only be obtained by a roundabout way, by means of a negative. The eye, on the other hand, immediately presents us with the diapositive, namely the true image."
"Our sight constitutes an unconscious, automatic transformation process, through which the negative image - like a photographic negative - (i.e. the effect), is transformed into a positive one, like a diapositive color slide. Our thinking, however, is really a purely individual, conscious process and therefore learnable. If our thinking is to attain the same perfection as our seeing, then we must change our way of thinking and learn to see reality, not as an action, but as a reaction. Perfect thought lies in the apprehension of the correct reaction, for before the eye can show us the positive, it must first transform the negative and in a certain manner must break up what it records. What we see therefore, is the turning inside out of what we receive. What our mind grasps in this way must be re-formed and re-thought if we wish to attain what we strive for."
Source: Callum Coats: Living Energies (2002)