"Lust is a force, in that it refines the spirit by bringing to white heat the excitement of the flesh. The spirit burns bright and clear from a healthy, strong flesh, purified in the embrace. Only the weak and sick sink into the mire and are diminished. And lust is a force in that it kills the weak and exalts the strong, aiding natural selection.
Lust is a force, finally, in that it never leads to the insipidity of the definite and the secure, doled out by soothing sentimentality. Lust is the eternal battle, never finally won. After the fleeting triumph, even during the ephemeral triumph itself, reawakening dissatisfaction spurs a human being, driven by an orgiastic will, to expand and surpass himself."
Valentine de Saint-Point, Futurist Manifesto of Lust (1913)