Where Do Ideas Live Before They Become Ideas?

Once upon a time, I was having a creative block. I just felt out of ideas, Steve, pushing me to create, said to me "sometimes I sit down at the computer and think I have no ideas, then I start messing around and before you know it, I've written a new song." This was the inspiration behind this piece, which led me to an even greater thought....where do ideas live before they become ideas? The odd purple shape you see in the bottom left of this drawing is the first line that sparked this entire piece. The flow doesn't make sense to me, yet it created art that makes perfect sense. Where did this idea live before it became an idea?

8"x 10"