Read the excerpt from "Mending Wall." 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. 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." Based on the excerpt, what does the speaker think of his neighbor?