All Roads Not Taken

What is the irony in the poem, "The Road Not Taken".

   Robert Frost's poem, "The Road Not Taken", describes the account of a man who makes a decision that he thinks will define his life only to predict its irrelevance and his unwavering belief.
"The passing there had worn them really about the same." Frost describes the two roads, whether they be literal or metaphorical, as nearly identical and uncharted. It seems illogical to put so much consideration in a simple decision let alone how it will affect him years into the future.

The speaker imagines years into the future that he will recount his decision saying, "Two roads diverged in a wood and I- I took the one less traveled by." By saying he took the road less travelled, he appears to be audacious in his life choices by braving the unknown. Realistically speaking, all roads, metaphorically speaking, are untraveled. It is impossible to predict one's future the same way it is to revisit decisions from the past.

"I shall be telling with a sigh...that has made all the difference." Even though the speaker greatly contemplates his choice, his decision ultimately would not have made a difference because regardless of which road he took, the results would have been unfamiliar. His realization is evident in his 'sigh' which suggests that he now understands the uncertainty of life. Despite this, he continues to portray himself as intrepid.