„Who can still believe in the opacity of bodies since our sharpened and modified sensitivity has already penetrated the obscure manifestations of the medium? Why should we forget in our creations the double power of our sight, capable of giving results analogous to those of X-rays?“
— Umberto Boccioni Italian painter and sculptor 1882 - 1916
As quoted in Futurism, ed. Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 154.
1910, Manifesto of Futurist Painters,' April 1910