"I felt a Funeral, in my Brain" Emily Dickinson

This poem can be interpreted in different ways, but I think that it is extended metaphor of someone that is going insane. Dickinson uses the sense of sound throughout the work to give the impression of being inside a coffin during a funeral; I think that she is actually trapped inside her own mind with all of these thoughts running through it. The "mourners to and fro" would be the people in her life, but doesn't communicate with because they don't understand. They "kept treading" and going on with their lives while she couldn't. In the second stanza she refers to the beating of a drum, which could be the consistent pains that she has and cannot control. She comes out and says "My mind is going numb" in line 12. She hears "Boots of Lead" lift "a box," her coffin, and "creak" across her soul in stanza 3, further exemplifying the use of sound. Still in stanza four, she refers to the Heavens as a bell. She says she is in "some strange race" with silence. I think this is her trying to fight the thoughts inside her head. "And then a Plank in Reason, broke," AKA she loses the fight and snaps falling into the insanity.