Aesthetics and History in the Visual Arts; and Sketch for a Self-Portrait, by Bernard Berenson
Mr. Berenson, who is a great connoisseur of Italian art, has said that there are two kinds of experts in painting, the contractionists and the expansionists. The first are very strict in accepting a work as by the hand of a master; it must not only be shown to have issued from his workshop, but it must exhibit his personal touch in the smallest details. The expansionists are more generous and easy-going; since the style and conceptions of a master are transmitted to his students and assistants, any work that shows clear enough traces of his art may be judged to be his own, even if not executed entirely by his hand.
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