This is a note from the commentary to Nidanasamyutta, 4. Kaḷārakhattiyavaggo, 5. Avijjāpaccayasuttaṃ, (B. Bodhi trans.), hope it helps:
<<<<  Spk: The living of the holy life (brahmacariyavāsa) is the living of the noble path. One who holds the view “the soul and the body are the same” (taṃ jīvaṃ taṃ sarīraṃ) holds that the soul and the body are annihilated together (at death). For one who holds this, the annihilationist view follows, for he holds that “a being is annihilated.” Now this noble path arises to stop and eradicate the round of existence. But on the the round ceases even without the development of the path, and thus the development of the path becomes purposeless. In the second case, one holding the view “the soul is one thing, the body another” (aññaṃ jīvaṃ aññaṃ sarīraṃ) holds that the body alone is annihilated here, while the soul goes about freely like a bird released from a cage. This view is eternalism. But if there were even one formation that is permanent, stable, and eternal, the noble path would not be able to bring the round to an end; thus again the development of the path would be purposeless.