A vanishing point— where edges of the road you’re traveling meet and from which you can go no further. Measure the angle edge to edge, and the distance between, then figure how far you can go to where you can go no further. The higher your eye from the road, the smaller the angle, and the farther to the vanishing point. You can go no further. Clearness of air or thought help none to extend the distance. Even to the blind, the vanishing point does not draw near, and you can go no further. Another eye goes overhead, offers another view. Ask that person how far it is to the vanishing point and whether or not you can go no further.