The poem "Do Not Go Gentle Into That Good Night" by Dylan Thomas is addressed to his dying father, urging him not to accept death quietly but to continue living passionately until his last breath. Thomas uses the villanelle form and poetic devices like metaphor, simile and refrain to reinforce the theme of raging against death. He compares his father to wise men, good men and wild men who fought against their mortality with fervor. Even when facing death, Thomas wants his father to maintain his intensity for life and go down fighting rather than slipping gently into death's night.