He also wrote poems that are prone to being misread and/or misremembered. The best-known and most-cited example of this is "The Road Not Taken," which many believe to be about the nobility of forging your own path, when it's more accurately characterized as a semi-sarcastic poem about the arbitrariness of choice and how we're all inclined to wrench our shoulders patting ourselves on the back as we retrospectively rationalize our choices. To the credit of the people confused by "The Road Not Taken," though, the message of the poem isn't at all obvious. Frost buried the irony of the poem so deep that even the friend he wrote the poem for didn't realize that Frost was "gently teasing" him.
A less famous example (at least to those not obsessed with The West Wing) is Frost's 1914 poem "Mending Wall." Unlike "The Road Not Taken," the meaning of "Mending Wall" is transparently clear, as obvious as a fire at an indoor poetry reading. For this reason, the case of "Mending Wall" is even more egregious: the poem originated the famous expression, "Good fences make good neighbors"; the problem is that the poem itself is explicitly about the wrongness of that expression.
This is "Mending Wall":
Something there is that doesn't love a wall,
That sends the frozen-ground-swell under it,
And spills the upper boulders in the sun;
And makes gaps even two can pass abreast.
The work of hunters is another thing:
I have come after them and made repair
Where they have left not one stone on a stone,
But they would have the rabbit out of hiding,
To please the yelping dogs. The gaps I mean,
No one has seen them made or heard them made,
But at spring mending-time we find them there.[Pause to recap: Nature hates walls. The very earth repels them, grinding them down in the winter while humans aren't looking.]
I let my neighbour know beyond the hill;
And on a day we meet to walk the line
And set the wall between us once again.
We keep the wall between us as we go.
To each the boulders that have fallen to each.
And some are loaves and some so nearly balls
We have to use a spell to make them balance:
"Stay where you are until our backs are turned!"
We wear our fingers rough with handling them.
[Okay, so, ironically, the wall brings the speaker and his neighbor together, as they meet to rebuild the crumbling wall. That's a perk of walls, I guess, although there's probably a way for the neighbors to bond that doesn't involve destroying the flesh on their hands.]
Oh, just another kind of out-door game,
One on a side. It comes to little more:
There where it is we do not need the wall:
He is all pine and I am apple orchard.
My apple trees will never get across
And eat the cones under his pines, I tell him.
He only says, "Good fences make good neighbours."
[That's kind of a jerky thing to say. The speaker tries to tell his neighbor good-naturedly that the wall isn't needed, and how does the neighbor respond? Basically, "We'd probably hate each other if this wall weren't here."]
Spring is the mischief in me, and I wonder
If I could put a notion in his head:
"Why do they make good neighbours? Isn't it
Where there are cows? But here there are no cows.
Before I built a wall I'd ask to know
What I was walling in or walling out,
And to whom I was like to give offence.
Something there is that doesn't love a wall,
That wants it down." I could say "Elves" to him,
But it's not elves exactly, and I'd rather
He said it for himself. I see him there
Bringing a stone grasped firmly by the top
In each hand, like an old-stone savage armed.
He moves in darkness as it seems to me,
Not of woods only and the shade of trees.[Yep, the speaker sounds a little offended. But now we've got an explanation for why the neighbor is so hot on walls: the neighbor is an unenlightened savage. Only unenlightened savages feel like walls are necessary even when there aren't any cows around.]
He will not go behind his father's saying,
And he likes having thought of it so well
He says again, "Good fences make good neighbours."[This is the end of the poem, and the plot thickens right at the close. The neighbor blindly believes in the value of fences because it's something his father said, despite all this objective evidence that fences are pointless. This is why it's important to think for yourself, children!]
So, in sum, "Good fences make good neighbors" is a phrase that Robert Frost puts in the mouth of a stubborn, willfully ignorant man entrenched in his misguided beliefs. If we want to honor the actual spirit of the poem, we should all get to work on popularizing "Something there is that doesn't love a wall." I'm not sure where we'll find applicability for that 100-year-old phrase here in 2017, but maybe something will present itself.