The main character of "A Rapture" is a man, and describes what he would like to do with his "only love", Celia. Throughout the poem, he acts very entitled and proud, as though he could have any woman he wanted, and Celia should be lucky that he picked her. The poem, written in first-person, does not give any point of view by Celia.
This poem begins with the narrator trying to prove himself to Celia, creating a fictional kingdom and giant with his words. Telling Celia that the only way to get past the ferocious giant is with courage, he tells how courageous he is.
The narrator then describes that after fighting past the giant, the two will come to a heavenly lawn, where they will lie together under the sun, kissing one another. This fantasy continues for quite a while, with the narrator commenting on Celia's wonderful features and her virginity.
Throughout, the poem mentions many aspects of religion, and in the end, the narrator tells that he doesn't really like religion after all. This is because most of the things he would like to do with Celia would be frowned upon by religion, and he would not like to be thought of as an "atheist" for doing them.