Dylan Thomas, the Welsh poet, was born 100 years ago, a centenary currently being celebrated.

Here is one of his best-known poems, a spirited injunction to his father to defy inevitable mortality.

DO NOT GO GENTLE INTO THAT GOOD NIGHT

Do not go gentle into that good night,

Old age should burn and rave at close of day;

Rage, rage against the dying of the light.

Though wise men at their end know dark is right,

Because their words had forked no lightning they

Do not go gentle into that good night.

Good men, the last wave by, crying how bright

Their frail deeds might have danced in a green bay,

Rage, rage, against the dying of the light.

Wild men who caught and sang the sun in flight,

And learn, too late, they grieved it on its way,

Do not go gentle into that good night.

Grave men, near death, who see with blinding sight

Blind eyes could blaze like meteors and be gay,

Rage, rage, against the dying of the light.

And you, my father, there on that sad height,

Curse, bless, me now with your fierce tears, I pray.

Do not go gentle into that good night.

Rage, rage, against the dying of the light.