The woods are lovely, dark and deep, / But I have promises to keep, / And miles to go before I sleep, / And miles to go before I sleep.

These are the last four lines of the poem, which Frost said he wrote in a single sitting. It appeared in his 1923 collection New Hampshire. The repeated last line is often read as a pledge to keep going, and just as often as a thought about death or rest; the poem supports both.