Lecture II
In the lecture yesterday I pointed out how we should have to study three main stages of human consciousness, though naturally with many different shadings. The states of consciousness with which we are familiar—waking, dreaming and sleeping—are valid only for the present. If we go back into older periods of human evolution we no longer find the sort of waking condition of today, with its logically interrelated concepts. The farther we go back, the more do we fail to find this logical consciousness, which appeared in full development only during the fourteenth and fifteenth centuries, though it had begun in the later period of Greek culture. In earlier times, on the other hand, we discover a type of consciousness filled much more with living pictures than with abstract concepts; and we find this consciousness in man everywhere.