Jessea L. Vaughan's poem makes one blunt point and keeps coming back to it: words are not food. The speaker lists things people lean on, such as promises, fond memories, even their own doubts, and says none of them can sustain a person. Promises give "a momentary sense of security," but they fade once they're fulfilled or forgotten. Memories can't give you strength for the next hour. Doubts don't nourish anyone; they "gnaw on happiness" until only "a sad starving shell" remains.
The tone is plain, almost weary, like someone who has been let down before and is tired of pretending otherwise. The repeated "you cannot" sounds like a lecture, yet the last line, "Though you wish you could," lets some longing slip through. The speaker seems to want words to be enough. The list of "dialogues, / Descriptions, / Delusions, / And declarations" is a small moment of wordplay, lumping honest speech in with self-deception. The mood is sober and a little sad, but it is also practical: dreams and promises matter only if something real follows.