Christ and the Evolution of Consciousness

The process of memory, however, is not rightly understood by the ordinary consciousness of man. He thinks that he has known and perceived certain things in the outer world, that pictures have remained somewhere in the background of his being and that he can call them up again in his soul as memory-pictures. But the process is by no means so simple. Consider for a moment what goes on in man, step by step. You are certainly familiar with the ‘after-images’ that arise from what is perceived by the senses, by the eye, for example. As a rule we do not stop to think about them, but they are aptly described by Goethe in his Theory of Colours. He speaks of them as ‘vanishing after-images.’ We look intently at some object and then close the eyes. Different images or pictures linger for a while on the retina and then die away like an echo. In ordinary life we pay little heed to these images because we set up a more forceful activity than that of mere perception. We begin to think. If our thought-activity is weak when some object in the outer world is perceived, an after-image remains on the retina. But if we really think, we take the outer stimulus further inwards, as it were, and a thought-image lingers on as a kind of echo.