The poem is celebrating continuing generations, and perhaps could be broadened to represent the cycle of birth, death and rebirth for all humanity.
After peering down one road as far as he can see, the speaker chooses to take the other one, which he describes 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.
The narrator has been convinced to make the climb, although the reader is left wondering whether he did so. Fire and Ice is a beautifully evocative short poem; highly structured and compact. Other poetic devices include the rhythm in which he wrote the poem, but these aspects are covered in the section on structure.
It is about what the poem never mentions: the choice the speaker did not make, which still haunts him.
Wind and snow are hitting a basement window, but when the speaker taunts the storm it responds and gets angry. The final couplet, "I took the one less traveled by, And that has made all the difference" contains a clear message that there are always two choices in life.
By the end of the poem, the mountain has been so well described that the terrain seems familiar to anyone who has walked and climbed in mountainous or hilly areas. And in the last line he concludes that we do not know whether there is a designer, or whether everything in life is occurs in a random fashion.
Does it in fact indicate a loss of adventurous spirit?
Frost is the master of everything that he creates in this poem, down to each individual syllable. In this it strongly resembles its creator. The Hand of the Poet,Rizzoli.
Then by rhyming the last two lines, there is a classic Shakespearean couplet or "heroic couplet" within those final differently structured 6 lines.