ABSTRACT
When we turn from the image to the concept we return from a byway to the highroad of mental development. Images have been discussed in some detail because their relation to thought is so intimate that they have often been identified with thought itself. But the thinking that uses images stands at no one level in the growth of thought, nor can it even be called one kind of thinking; to call it so would be to classify thinking by what is extrinsic to it. And so long as the image provides the idea with only an external support, there is no reason to regard it as either a part or a species of thought.
