I don’t call it sleep anymore.I’ll risk losing something new instead—
-- The Speaker (Lines 1-2)

Importance: In the opening lines, the speaker begins her process of redefinition that colors the entire poem. When she says that she risks "losing something new," she refers to her insomnia, which causes her to lose sleep in the first place (2). Thus the act of renaming opens both possibilities and risks.

But sometimes when I get my horns in a thing—a wonder, a grief or a line of her—it is a sticky and ruinedfruit to unfasten from, despite my trembling.
-- The Speaker (Lines 4-7)

Importance: The speaker evokes her animal body in this image. To get one's horns in something refers to an obsession, and the speaker indicates that she easily gets caught in hers. Even if her obsessions cause her anxiety (as indicated by her trembling), she cannot simply extricate herself from them. The image of horns and ruined...