To me, Robert Frost's poem "The Road Not Taken" addresses the ways in which we assign significance to our choices. The poem is indeed at least in part about the choice between two possible routes that the speaker walking along the wooded trail could take. At least two sets of details in the poem drive home the notion, however, that these two paths really aren't that different:
... the passing there
Had worn them really about the same,
And both that morning equally lay
In leaves no step had trodden black
Both paths, in other words, look both equally worn and untrodden. The human speaker, however, seems compelled to assign all kinds of meaning to this moment of being faced with two possible paths while strolling one morning through the woods and to attribute that paritcular choice to the individual. The final stanza drives this pont home with the repeated use of "I" and perhaps some gentle mockery of the idea of assigning all kinds of meaning to a simple walk in the woods.