What are the motifs in The Weight of Sweetness by Li-Young Lee?

Love is a recurring idea in the poem. "The Weight of Sweetness" explores the love between a father and his son. It is a love that continues after death, and one which needs to be understood in relation to death. Lee suggests in this poem that the person who dies lives on not only in the memory of those left behind but also in their everyday lives. Symbolically, and in effect, the son becomes the father whom the son is mourning.