"When you walk," according to an introduction to an interview with the Canadian philosopher Brain Massumi, "each step is the body’s movement against falling — each movement is felt in our potential for freedom as we move with the earth’s gravitational pull. When we navigate our way through the world, there are different pulls, constraints and freedoms that move us forward and propel us into life." From this point of view our walking is a controlled falling. We cannot overcome gravitation but are not wholly in its power. There is scope for motion - and motion itself is not thought of as static: in navigation of the movement arises freedom, change, hope, scope for decisions and virtuality, from which newness may arise."