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人の身で/灯りの無く/ 深夜の森を行くのは/あまりに過酷な作業である
In the human body, also has no light, late-night walk through the forest is a dangerous thing.
身⇒ からだ、身体
灯り ⇒ light
灯り「の」なく ⇒ 「の」 is old Japanese.
This old Japanese, represents the state of the forest that was deserted.