Here's why:
* Themes: The poem explores deep philosophical concepts like the nature of truth, the role of the individual in society, and the power of imagination.
* Structure: It doesn't follow a traditional fable structure with animals and a clear moral. Instead, it's written in free verse with a more abstract and symbolic language.
* Focus: The poem centers on the narrator's own reflections and musings rather than presenting a straightforward narrative.
While "Fable" does have elements of allegory, its primary purpose is to present Emerson's own thoughts and ideas on existence and the human condition, making it a philosophical poem.