Just as a chemist "isolates" a substance from contaminations that distort his view of its nature and effects, so the work of art purifies significant appearance. It presents abstract themes in their generality, but not reduced to diagrams.
Rudolf ArnheimThe ambition of instantaneous photography... was that of preserving the spontaneity of action and avoiding any indication that the presence of the picture taker had a modifying influence on what was going on.
Rudolf ArnheimWhat, then, is the basic difference between today's computer and an intelligent being? It is that the computer can be made to seebut not to perceive. What matters here is not that the computer is without consciousness but that thus far it is incapable of the spontaneous grasp of pattern--a capacity essential to perception and intelligence.
Rudolf ArnheimSince mechanically obtained randomness contains all kinds of possible permutations, including the most regular ones, it cannot be relied upon always to exhibit a pervasive irregularity.
Rudolf Arnheim