It also uses the extended metaphor that the sun is life, therefore sunset and therefore darkness is death. However, in "On my first Sonne", the extended metaphor used throughout the poem is contrary to that in "Do no go Gentle". In “On My First Son,” the metaphor symbolizes that his son was loaned to him by God and that every day he spent with his son was a day more than he was owed. Both poets use nostalgia to present different ideas, Thomas uses the idea that death is approaching, "Tomb men, near death" while Jonson uses the contrasting idea that death has already come and taken his son , “Farewell, you, child of my right hand. '. They both show their feelings towards their family, as neither of them wants to lose their family as their attachment is strong. Jonson focuses on the theme of grief, of overcoming the loss of his son, while Thomas focuses on the theme of despair, of not letting his father go.