In the poem "The Road Not Taken" by Robert Frost, the speaker comes to a fork in the road and must decide which path to take. After carefully considering both options, he chooses the less-traveled path and notes that it has made all the difference in his life.
Towards the end of the poem, the speaker reflects on the decision he made and says, "I shall be telling this with a sigh / Somewhere ages and ages hence: / Two roads diverged in a wood, and I— / I took the one less traveled by, / And that has made all the difference." This indicates that he is happy with the choice he made and that it has had a positive impact on his life.
However, he also says earlier in the poem that he doubted he would ever come back to this point and travel down the other road, stating, "Yet knowing how way leads on to way, / I doubted if I should ever come back." This suggests that he realizes the choices he makes in life lead to other choices, and once he has made a decision, he cannot go back and choose differently.
Therefore, the speaker believes that he will never go back and travel down the other road because he understands that life is a series of choices and once a decision is made, it cannot be undone.