Where Does Inspiration Come From?

I never know when it will strike. Flipping through the September Elle Decor, paintings on a wall in a house in Texas. One painting stood out.

Yes, this one. For some reason, its graphic quality called to me.  An idea came, so I followed. Sketching quickly I could see them all in a row.

She wasn't quite what I had in mind, but I continued on.

 A series of these earth maidens have bubbled up out of me. From that one painting on the wall. Really, is that where inspiration comes from?