With humans, it is like the bicycle. Only when moving can we easily keep balanced. – Albert Einstein, letter to son Eduard, 1930 February 5th, translated from German

Bicycling is the nearest approximation I know to the flight of birds. The airplane simply carries a man on its back like an obedient Pegasus; it gives him no wings of his own. – Louis J. Helle, Jr., Spring in Washington

A bicycle does get you there and more…. And there is always the thin edge of danger to keep you alert and comfortably apprehensive. Dogs become dogs again and snap at your raincoat; potholes become personal. And getting there is all the fun. – Bill Emerson, “On Bicycling,” Saturday Evening Post, 1967 July 29th