"Do Not Go Gentle into That Good Night": Death Through Repetition and Diction In Thomas' "Do Not Go Gentle into That Good Night," he depicts the inevitability of death through repetition and diction. Furthermore, he portrays the stages of man's life in his comparison to "good men, "wild men," and grave men." Finally, Thomas' medium of poetic expression presents itself in the villanelle. The villanelle's persona speaks in this poem as the son of a dying father. Line sixteen states "And you, my father,…" and this proves the speaker's persona. The old man, at his deathbed, receives encouragement