"Do not go gentle into that good night" is a poem by Welsh poet Dylan Thomas, and is one of his best-known works. The poem is about death, and the speaker offers advice to his father about how to face death with dignity, bravery, and passion for living. The poem encourages people to fight bravely against death and to celebrate the vivacity and joy of human life despite its fleetingness. The poem is written in the form of a villanelle, which has a rhyme-and-refrain pattern. The refrain of the poem is "Do not go gentle into that good night," and the speaker uses this refrain to describe different types of men who embody the poems message. The first five stanzas focus on different types of men, and the speaker thinks about how they will have to face death one day, too. The final stanza becomes more personal as the speaker addresses his father, who is approaching death, with the same request: to approach death with defiance and a passion for living. The poem has been set to music by several composers, including Igor Stravinsky and John Cale.