"it is surmised that when people are in a creative state, the cerebral cortex first establishes restful awareness. Creativity exhibits the alpha rhythms of relaxation; subjectively the person feels open and receptive. unline other periods of relaxation, this state is on the look out for something-a stroke of inspiration- and when it occurs a spike of activity is registered by the mind as a moment of "Eureka!" Famous artists and inventors all testify to this experience, and in their work it can have truly profound implications. a eureka isnt ordinary thinking. truly creative people tend to introduce a question into their minds and then wait for the solution to arrive-hence the necessity of going into a relaxed mode."
deepak chopra from "how to know god" on the spiritual connection to the creative state.