What are the motifs in A Mercy by Toni Morrison?

Family relationships are a recurring idea in the story. There are many types of family, both family of origin and family of choice. Florens lives with her biological family until she is sent to the Vaarks. Once at the farm, Florens creates a new family with the other slaves including Lina and Sorrow. Florens also hopes that the blacksmith will become her family.