The figurative language in lines 3 and 4, are associated with lines 1 and 2 because they show that love is not an essential element for human life.
This reinforces the central idea of the poem, that there are elements besides love that must be considered as more important, as saviors and providers of comfort and security.
"Love is not all" is a sonnet written by Edna St. Vincent Millay, where she addresses how love cannot meet the physical needs of human beings, and therefore cannot be considered as essential.
Ernesto and Leticia are the parents of Manuela and Arturo. Jorge and Victoria are Ernesto's brothers. Celia and Zenaida are Leticia's sisters. Raúl is Victoria's son. Marta and Fermín are Zenaida's children. Fermín has two children, Jacinto and Zoe. Cristina is Zoe's daughter. Vicente is Manuela's husband. Paula is Arturo's wife.