What are the motifs in Blackberrying by Sylvia Plath?

Journey is a recurring idea. The speaker's journey through the lane of berries is analogous to the human journey through life. Sometimes people feel hemmed in on all sides by life's pressures, just as Plath's speaker feels surrounded by berries. The "hooks" in the poem, on one level part of the literal shape of the alley, can be read as events that change the direction of one's journey through life.