Knowledge and Water

"[...] learning and inventing are kin; both are processes of seeking out the surprise of something new. Certainty is learning's enemy, for it already knows and it cannot be surprised." Look at water as a metaphor: "If we want water, we head for the valley, not the high ground. Water flows to the humblest point, so that's where we'll find it. Once we really identify our ignorance, knowledge will flow in to make it go away." (Engines of Our Ingenuity No. 2011).