Pods unzip and out burst bundles of sealed lavender flower heads. Introducing Robert Hass’s Field Guide, I would tell students, “It matters where you read this,” the slim volume of poems held up for demonstration purposes, waved lightly between thumb and forefinger in front of me. “Read properly, these poems cast spells. What do I mean by that, you ask? I mean, used deliberately, in the sun, after walks through Australian and jungle gardens, after swimming and breathing exercises, beneath a bleached California sky, these poems are tools for the alteration of consciousness.”