Read it through once

-- St. 1. Ah, Love, but a day: Rev. H. J. Bulkeley, in his paper on ‘James Lee’s Wife’ (‘Browning Soc. Papers’, iv., p. 457), explains, “One day’s absence from him has caused the world to change.” It’s better to understand that something has occurred to cause the world to change in a single day; that James Lee has made some new revelation of himself, which causes the wife’s heart to have misgivings, and with these misgivings comes the eager desire expressed in St. 3, to show her love, when he returns, more strongly than ever.