Answer:
The line "the mystery which binds me still" comes from Edgar Allan Poe's poem "Alone." This poem is a reflection on Poe's sense of isolation and difference from other people. When he refers to "the mystery," Poe might be alluding to various elements of his personal life, his emotions, or experiences that he finds inexplicable or overwhelming, yet these feelings and experiences are what continue to "bind" him or hold him in their grip.
In the context of the poem, the "mystery" can be seen as the core of Poe's individuality and his solitude. Poe felt profoundly separate from his peers and from society, and this line suggests that there is a mystical or predestined quality to his isolation, something that defies easy explanation but is an integral part of his being, defining his existential reality.
Analyzing the line in a literary sense, one could point out the use of the word "binds," which conveys a sense of being constrained or held against one’s will. It suggests that the mystery is not only a part of him but something that restricts him, keeps him tied to a fate or a state of mind that he cannot escape. This could be the central enigma of self, existence, or the human condition that he is attempting to grapple with throughout his work.
Poe was known for his exploration of the dark aspects of the human psyche and for his themes of the macabre and the mysterious. Thus, "the mystery which binds me still" is a particularly apt reflection of his continued preoccupation with the dark and inexplicable forces of life that shape our experiences and our psyches.