The characteristic motion peculiar to the object (absolute motion), with the transformations the object undergoes in its shifting in relation to the environment, mobile or immobile (relative motion; both motions should be conceived in art)
Boccioni's quote on motion; as quoted in Futurism, ed. Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 328. - 'Pittura e scultura futuriste' Milan, 1914