Living as a sort of twin, as husband and wife or brother and sister, is a way of survival. In the case of artists these intense relations are curiously ambivalent, undefined collaborations - the two share in perceptions, temperament, in the struggle for creation, for the powers descending downward from art, for reputation, achievement, stability, for their own uniqueness - that especially. Still, only one of the twins is real as an artist, as a person with a special claim upon the world, upon the indulgence of society.

Elizabeth Hardwick, Seduction and Betrayal.