Robert Frost's - Mending Wall

In Robert Frost poem, 'Mending Wall', there are numerous examples of 'boundaries'. The poem is about two neighbours whose only contact with each other is to come along together annually to repair the stone wall which divides there two properties. Already, this creates a sense of irony in the fact these two people come together every year, to keep each other apart. The more modern neighbour, which is the persona that Robert Frost is writing from, sees no point for the wall because the only thing that its dividing is his neighbours pine tree from his apple orchard.

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 neighbors."

This also displays Frost's persona sarcastic view on the whole matter and describe his traditional neighbour as primitive caveman.

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 tree

The main example of physical boundaries is the stone wall, which is what the poem revolves around. Moral boundaries are also present in the poem. The traditional farmer who is in favour of the wall has a moral boundary against getting rid of the wall because it had been a part of his family for many years.