"Laissez chaque homme exercer l'art qu'il connait"
Let every man practice the art he knows
Attributed to Newbury Street Mural in Boston
Also to Frank Lloyd Wright as his response to critics' comments to his design of the Guggenheim Museum in New York.

"Make no little plans. They have no magic to stir men's blood and probably themselves will not be realized. Make big plans; aim high in hope and work, remembering that a noble, logical diagram once recorded will never die, but long after we are gone will be a living thing, asserting itself with ever-growing insistency. Remember that our sons and grandsons are going to do things that would stagger us. Let your watchword be order and your beacon beauty. Think big."

Daniel Burnham, Chicago architect. (1864-1912)