In Emily Dickinson's poem "324" ("Some keep the Sabbath going to Church") the speaker prefers to listen to birds singin. To be more precise, the speaker mentions that she has "A Bobolink for a Choister."
In this poem, the speaker compares two different forms of spirituality: while some prefer to go to church, she finds it rather restrictive and prefers to indulge in nature. The images of Birds as choister and sexton, and the orchard being her dome convey the idea of freedom. It could be said that instead of going to church, she develops her spirituality in contact with God's creations.
