Why is walking meditation simple? Because there’s nothing to learn. We ARE already able to walk, we do it every day. And we’re also able to focus our attention on something, to concentrate whenever it’s necessary for example while driving or booking a flight on the internet. We only need to connect two kinds of activity we already master perfectly: walking and concentrating. So the main obstacle is not given by what we have to learn but by our habit which is a habit of living like sleepwalking, of living without being really awake and in touch with reality. We need to lose a habit, we don’t need to learn anything new.