• Perhaps the importance that we must attach to the achievement of an artist or a group of artists may properly be measured by the answer to the following question: Have they so wrought that it will be impossible henceforth, for those who follow, ever again to act as if they had not existed?

    Walter Sickert, Anna Gruetzner Robins (2003). “Walter Sickert: The Complete Writings on Art”, p.253, Oxford University Press on Demand