If I can stop one heart from breaking, I shall not live in vain; If I can ease one life the aching, Or cool one pain, Or help one fainting robin Unto his nest again, I shall not live in vain. —“If I Can Stop One Heart from Breaking," Emily Dickinson Based on the repetition of “I shall not live in vain,” what is most likely the subject of the poem? living life without pain living life with questions living life with a purpose li