"[Futurism's] ..superficial expression of velocity, the aeroplane, the racing-car and so on, is but a weak expression of the inner velocity of thought compared to which the velocity of radium represents nothing but inertia.. .The mimetic expression of velocity (whatever its form may be: the aeroplane, the automobile, and so on) is diametrically opposed to the character of painting, the supreme origin of which is to be found in inner life."