Mood Is one of loss and happiness. Expressed by the lines, "Love by Memorial Mold" and "Peace—By battles told" With both lines symbolizing the happiness of Love but then the bitter taste of losing that love.
Emily Dickinson expresses herself in the poem by how she has faced many troubling heartbreaks and loses in her life showing her that we take many things we are given for granted, until they are taken away from us forever.