Robert Frost did it

The speaker invokes Robert Frost before asking who will publish a claim about the sun. A remembered trip across the tropic of Capricorn ends with a return to the starting place and anger at that return.

The speaker begins with the sufficiency of saying what one thinks, then challenges the ability to make such statements public. Crossing a named line on the globe promises departure, but the speaker returns. The poem leaves the invoked Frost and the speaker's astronomical assertion within its own argument.

'Robert Frost did it' begins 'Saying what you think / and that is enough', questions who will publish a challenge to accepted truth, and ends 'Back where you started from / And pissed off about it'.

The speaker sets plain speech against the difficulty of being heard, and the return to the starting point lands as comic frustration rather than defeat.