Upanishads 5.12

Upaniṣads 5.12

taṃ durdarśaṃ
gūḍhamanupraviṣṭaṃ guhāhitaṃ gahvareṣṭhaṃ purāṇam || adhyātmayogādhigamena devaṃ matvā dhīro harṣaśokau jahāti