When they taught me that what mattered most br was not the strict iambic line goose-stepping br over the page but the variations br in that line and the tension produced br on the ear by the surprise of difference, br I understood yet didn't understand br exactly, until just now, years later br in spring, with the trees already lacy br and camellias blowsy with middle age, br I looked out and saw what a cold front had done br to the garden, sweeping in like common language, br unexpected in the sensuous br extravagance of a Maryland spring.