"Experimentation and transformation in both art and science spring from the same root - to understand, to encapsulate the world. This is why I've ever found reductionism (and scientism) drearily limiting and worthily pompous - that utilitarian speculation over what art 'is for', that misapprehension of art as a kind of elaborate trickery, only readable in the light of neuroscience or physics. The best writers of fiction, artists, composers and scientists are, I've long felt, the ones who see the 'divide' as porous, and are open to findings in both great spheres of endeavour and experimentation."
In "Incognito: The Secret Lives of the Brain" by David Eagleman
I've experienced significant creative leaps in shorter timelines than 4 weeks I think because over many years I've become increasingly adept as recognising and leveraging useful elements and catalysts. However I also agree that deep, long-term immersion in a creative problem, descending into disillusion and the chaotic abyss and then often out of failure or accident finding a new path based on hard won knowledge and insight - is where real invention and deeper epiphanies reside. The first time I experienced the creative process at this depth was after months of investigation and it was life changing - not in terms of the creative result so much but because of my first hand experience of the creative journey itself. Sometimes, even Steven King takes thirty years to write a book. Often only a year or two. Sometimes he manages to pop one out in a couple of weeks.
If you're into the nature of consciousness, read on.