The twentieth century produced no greater poet than Dylan Thomas (1914-1953). And Thomas produced no poem more powerful or impassioned than “Do Not Go Gentle into That Good Night.” You read that right: Thomas said “gentle,” not “gently.”

In the poem Thomas exhorts his dying father not to be meek when facing the end, but rather to “Rage, rage against the dying of the light.”

The poem’s title is also its opening line, a line which since its first appearance in 1951 has been “improved” by a host of armchair grammarians who prefer gently.

It happened again last week, in a sentence written by a damn good journalist: “You know what Dylan Thomas wrote about going gently into that good night.”

A 2007 documentary called “Do Not Go Gently” received the Gold World Medal in Humanities at the New York Festivals Film and Video Awards. I am sure the film is a fine piece of work, despite its bungled title.

An Internet search turned up this article: “Poem Analysis of ‘Do Not Go Gently into That Good Night’ by Dylan Thomas.” One can only hope that the heedless chowderhead who wrote that heading did not also write the essay. But just to be on the safe side, I didn’t read a word of it.

Another online expert proclaims: “OK, Dylan Thomas gets a pass, but if he were still in school and that were an assignment, his teacher would probably take off points. It should read, ‘Do not go gently.’ ” Well, no, actually it shouldn’t. This mastermind is the one who needs a remedial English class.

In Thomas’s poem, go is an action verb (see short essay below), which is why these clueless critics insist on the adverb gently. True, we modify action verbs with adverbs, but certain sentences complicate the issue. We could say Don’t go into that meeting angrily, but we could just as properly say Don’t go into that meeting angry.

Action verbs and adjectives combine forces all the time. In Joe sanded the table smooth, the adjective smooth describes table, not sanded. Same with The book is lying open: no one would argue for the adverb openly, even though is lying is an action verb.

There is a subtle but pronounced difference between go gentle and go gently. And great poetry raises subtlety to an art form.

Thomas would never have chosen gently because it trivializes and vitiates his message. As an adverb, gently lasts only as long as the action it describes. Thomas is concerned with much more than one finite action. By choosing gentle (Do not go gentle = “This is not the time for you to be gentle”), Thomas puts the focus on you, all of you; all of us. He implores us to be tenacious and unwavering as we brace for the battle no mortal will ever win.

—Tom Stern

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Action Verbs and Linking Verbs

Main verbs fall into two broad categories: action verbs and linking verbs. In a sentence with an action verb, A does B. In a sentence with a linking verb, A is or is like B.

An action verb describes something being done (He left home) or taking place (The building collapsed). A linking verb is a kind of equal sign. It connects a noun with an adjective (They appeared restless) or with another noun (Bill was being a jerk), or it fleshes out the subject (I remain your friend always).

Where action verbs take adverbs, linking verbs require adjectives. This is why it is incorrect to say I feel badly about what I said. When feel is a linking verb, we feel bad (adjective), not badly (adverb); we only feel badly when our hands are numb. And when we feel with our hands, feel is an action verb.

Many verbs we think of as action verbs can sometimes be linking verbs. In They were getting breakfast, it’s clear that were getting is an action verb. But They were getting sleepy makes were getting a linking verb.