Where are irony, ambiguity, and paradox present in "The Road Not Taken" by Robert Frost ?

There are two crucial stanzas in "The Road Not Taken" by Robert Frost that are essential to the comprehension of the poem. The juxtaposition between these two moments explains the irony, ambiguity and paradox present within Frost's masterpiece. These stanzas are the second and final stanzas.

SECOND: 

Then took the other, as just as fair,

And having perhaps the better claim,

Because it was grassy and wanted wear;

Though as for that the passing there

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There are two crucial stanzas in "The Road Not Taken" by Robert Frost that are essential to the comprehension of the poem. The juxtaposition between these two moments explains the irony, ambiguity and paradox present within Frost's masterpiece. These stanzas are the second and final stanzas.

SECOND: 

Then took the other, as just as fair,

And having perhaps the better claim,

Because it was grassy and wanted wear;

Though as for that the passing there

Had worn them really about the same,

FINAL:

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.

An examination of these two stanzas demonstrates the paradox in the poem. The narrator explains that both of these roads are "worn... really about the same," and yet at the end of the poem the narrator claims that the road he took, which was less traveled by, made all the difference. This "less traveled by" is in direct conflict with "worn... really about the same." While some readers gloss over this juxtaposition, it is a crucial moment. The ironic (and ambiguous) part of the poem is that his choice of road didn't make any difference. The narrator is saying that people often proclaim their choices were special, when in fact they were standard. Frost is noting how nostalgia and narcissism transform how people talk about their past events and choices.