Verse 13

महत्यां मोहयामिन्यामुल्बणोऽज्ञानकौशिकः ।श्मशान इव वेतालः परिवल्गति हृद्द्रुमे

In plain words

In the great night that is delusion, the fierce owl of ignorance leaps about the tree of the heart, like a vetāla haunting a cremation-ground.