The spiraling shapes, and the beautiful contrasts of yellow and blue, that are intuitively felt one evening while living the movements of a girl dancing may be found again later, through a process of plastic preferences or aversions, or through combination of both, in the concentric circling of an aeroplane or in the onrush of an express train

In his manifesto 'The Plastic Analogies of Dynamism', c. 1914; as quoted in Inventing Futurism: The Art and Politics of Artificial Optimism, by Christine Poggi, Princeton University Press, 2009, p. 218