The speaker talks to someone they won't name, and they give that person a fake name, "Joshua," to hide who they really are. The first line even slips with "You're" instead of "Your," which makes the voice feel casual and a little rushed, as if the words are coming out in a hurry.
The speaker defines "Joshua" as a name for a generous person, then immediately says they are only disguising the person. They explain that a disguise makes something "different than what it actually is." That sounds like a quiet admission: the real person may not be generous at all, or the speaker can't bear to say who they really are. The ending is a plain plea: "Please, / Joshua, / Take it away." It's unclear what "it" is, which leaves the poem hanging. The mood is tense and guarded, with a flat, almost tired tone that suggests hurt held back behind careful, repetitive logic.