In the Art of Immersion, by Frank Rose, there is a lovely interview with David Lynch on non-linearity and the nature of thinking.

"Ideas are everywhere," says Lynch. "You get ideas all day long and once in a while you get an idea you fall in love with. That's a beautiful day. Bu you never get the whole thing at once. You get it in fragments. So many non-linear things are happening in a day. We've got this thing called memories, and a picture forms from memories or from imaginary things. An idea can be conjured by a little something you saw in Northern Ireland, and it swims in right next to something that's on the floor in front of you. The flow of all different kinds of things - if you were to put that together, it would be like a crazy film." 

Thanks to Hugh Weber for the reference.