The speaker describes two boys who travel through a country the speaker calls "filthy" and "grimly confident," a harsh label that sits oddly beside the boys' excitement. They follow the speaker's group without ever meaning to, simply caught up in wonder at everything around them. The opening sets them up as opposites: lightning and thunderclouds, summer and winter. Then comes a quiet twist, "one was me and one was you," which hints that the boys also stand in for the speaker and the person being addressed.
The two twins look identical on paper, with the same hair, eyes and passports, yet they move and see differently. One is restless, skipping ahead, his gaze drifting past people. The other is careful, hesitant, and looks at you so closely that he seems to see everything. The speaker is clearly drawn to the second twin. The ending is small and tender: he meets the speaker's eyes, smiles, and runs to catch up. The mood is warm, nostalgic and a little wistful, built on one remembered moment of connection.