People are like bicycles. They can keep their balance only as long as they keep moving. — Albert Einstein
My favorite piece of technical writing: Assembly of Japanese bicycle require great — Robert M. Pirsig
Concepts differentiate architecture from mere building…A bicycle shed with a concept — Bernard Tschumi
As one does a bear riding a bicycle. One sees it so rarely. (Spoken by Volger, on Deryn) — Scott Westerfeld
Life is like riding a bicycle. You get nowhere standing up, so get up on that seat and go! — Lynne Ewing