Eugène Delacroix was a close friend and respected her literary gifts. Flaubert, by no means an indulgent or forbearing critic, was an unabashed admirer. Honoré de Balzac, who knew Sand personally, once said that if someone thought she wrote badly, it was because their own standards of criticism were inadequate. He also noted that her treatment of imagery in her works showed that her writing had an exceptional subtlety, having the ability to "virtually put the image in the word." Alfred de Vigny referred to her as "Sappho".