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
After your first day of cycling, one dream is inevitable. A memory of motion lingers in the muscles of your legs, and round and round they seem to go. You ride through Dreamland on wonderful dream bicycles that change and grow. – H.G. Wells, The Wheels of Chance