For 10 points, name this Welsh poet of "Do not go gentle into that good night."
He concluded one poem with the lines "And I am dumb to tell the lover's tomb / How at my sheet goes the same crooked worm." This poet of "The force that through the green fuse drives the flower" opened one poem describing how in his youth he was as "happy as the grass was green." The lines "Time held me green and dying / Though I sang in my chains like the sea" conclude his poem (*) "Fern Hill." He wrote a poem declaring that "Old age should burn and rave at close of day" and told his father to "Rage, rage against the dying of the light."  For 10 points, name this Welsh poet of "Do not go gentle into that good night."
He concluded one poem with the lines "And I am dumb to tell the lover's tomb / How at my sheet goes the same crooked worm.
Dylan Thomas