For people who have stopped noticing, the only possible new or renewed experience, and, therefore, new knowledge, is from a work of art. Because that is the only kind of experience which they are prepared to receive on its own terms: they will come out from their shells and expose themselves to music, to a play, to a book, because it is the accepted method of enjoying such things. True, even to plays and books they may bring artistic prejudices which prevent them from seeing that play or comprehending that book. Their artistic sensibilities may be as crusted over as their minds.