One possible interpretation of the significance of the poem "The Road not Taken" by Robert Frost is that people must make choices, and each choice made will impact the future. In the poem, the speaker comes upon two roads that "diverged in a yellow wood." The speaker has to select the road he wishes to takes to continue on his walk. The speaker spends a great deal of time choosing the road, wishing he could take both. However, the speaker eventually chooses the road "less traveled by" and decides that made "all the difference" in his life. This commentary on life's choices makes the case that decisions made today will impact tomorrow.
it can also be sadness because he says that i shall be telling this with a sigh so it can be sadness and it can be sigh with relief here it is not mentioned in this context .