The speaker sets themselves beside the sun and, at first, comes up short. The sun rises easily and greets the day with open hands, while the speaker drags out of bed, arms closed, needing coffee before feeling bright. Even the details of place add to the contrast: the sun sits high in a blue sky, and the speaker is stuck on the ground among concrete. The tone here is light and a little jokey, the voice of someone who admits mornings are hard.
Then the poem turns on the words "though" and "The sun and I." The two share a love of early sounds like birdsong and rustling leaves, and of summer days with friends. They also share loneliness, because both know who they are and not everyone accepts that. The mood shifts from playful to warm and quietly determined. By the end, the speaker admires the sun for holding steady and not changing for anyone, and seems to want that same confidence.