Final answer:
John Keats promises to devote himself to the goddess Psyche in a spiritual or metaphorical manner, offering a sanctuary within his consciousness rather than constructing a physical palace.
Step-by-step explanation:
In John Keats' poem, he promises to devote himself to Psyche. The narrator does not speak of building a physical palace for her but instead offers a different kind of devotion. He expresses a willingness to create a sacred space for her within his mind, essentially building a spiritual or metaphorical 'palace' in his consciousness where he can worship and honor her. The poem explores themes of love, devotion, and the interplay between the mortal and the divine, common in Romantic poetry. The closest option to Keats’ intent in the poem would be a dedication to Psyche, rather than building her a palace, finding a new love, or abandoning her.