"The Road Not Taken" is a narrative poem. It reads naturally or conversationally and begins as a kind of photographic depiction of a quiet moment in woods. It is one of Frost's most popular works. Regarding the "sigh" that is mentioned in the last stanza, it may be seen as an expression of regret or of satisfaction, but there is significance in the difference between what the speaker has just said of the two roads, and what he will say in the future.