Hazel McKay's poem is a simple journey: you walk until the land runs out, and then you keep looking until the world turns into sea and sky. It begins with a plain, almost matter-of-fact statement, "The land eventually comes to an end," and then slowly opens up into something larger and more wonderful.
The speaker seems calm and quietly awed. The short lines move at an unhurried pace, like someone walking toward the shore, and the phrase "Just blue" strips everything else away. There is no clutter, no people, no detail beyond the colour itself. That repetition of blue makes the feeling of being surrounded very physical.
The final line shifts to "you," pulling the reader into the scene. The mood is peaceful and freeing, as if reaching the horizon means leaving ordinary worries behind. It could also hint at a kind of new beginning, since the land, the familiar part, has been left behind.