nirvikāra - unchanged; deha-mana - body and mind; kāṣṭha-pāṣāṇa-sama - like wood or stone; āścarya - wonderful; taruṇī-sparśe - in touching young girls; nirvikāra - unchanged; mana - mind.

“His mind is as steady as wood or stone. Indeed, it is wonderful that even when he touches such young girls, his mind never changes.