Answer: "A boy juggling a soccer ball" is about practice that leads to perfection. In the poem, the author uses repetition to describe the moments of repetition, similarly to writing poetry. The diction is formal hence making the tone serious because we feel a sense of focus that radiates from the boy as he tries to control the ball. This is similar to rewriting lines and erasing errors when writing poetry. Towards the end of the poem, the poet describes the hot summer day the boy is enduring in order to attain perfection and ultimately success, which can double as a poet fighting himself to create the best piece of poetry he can.
Explanation: hope this helps!