When I say that in the humanities more generally you have to be prepared to read fast, the idea is that you have to make yourself not so much go back over a text as go on from it. You respond in a sense oppositely to the same fact as discovered in philosophy, namely that a text worth reading carefully, or perpetually, is inexhaustible. You always leave it prematurely. And a reason for leaving is that the next text may be more apt to illuminate it than another look at the same text.