Bicycles and Circles
Pi connects one circle to another. Pi in our mind connects to pi in the wheels of the bicycle, to pi on the circle of where we are now, to where we want to go. The bicycle frees us to travel larger distances more quickly. The circle gives us the intelligence to do so. (Image: http://www.first-to-fly.com/Information%20Images/Photos/1897%20Wright%20Bicycle.jpg)