Bhashya
ह वै भयस्य जन्ममरणादिलक्षणस्य आत्मन तमसश्च तत्का-रणस्याज्ञानलक्षणस्य भवति ॥
In plain words
Fear, whose hallmark is birth and death, and the darkness whose root is ignorance, arise precisely from mistaking the self.
Close to the Sanskrit
Indeed, of fear characterized by birth, death, and the like, and of darkness whose cause is characterized by ignorance, there is [arising] from the self.