“my brain worked with a dim and undetermined sense of unknown modes of being”
Context: After the encounter, the speaker is left haunted and changed.
Analysis
The vague, abstract diction ("dim", "undetermined", "unknown") reflects how the experience has unsettled the boy's entire understanding of the world. Nature's power lingers in his mind long after, suggesting its lasting psychological impact. The sublime humbles human reason itself.
Language Techniques:
Exam Tip
Good for the lasting effect of nature on the human mind. Compare to the lingering trauma in "Remains".