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The protagonist of “Stopping by Woods on a Snowy Evening” pauses for a minute to take in the peace of a sylvan snowfall before continuing a journey of “miles to go before I sleep.”

The first line of “Stopping By Woods” - “Whose woods these are I think I know” - and the final, haunting line, “And miles to go before I sleep” - are instantly familiar to millions of Americans.

But I have . . . miles to go before I sleep.”

“But I have promises to keep. And miles to go before I sleep,” Karzai said that September day, quoting Frost.

“But I have promises to keep, And miles to go before I sleep.”