Chāndogya Upaniṣad 6.14.1

6.14.1

yathā somya puruṣaṃ gandhārebhyo 'bhinaddhākṣam ānīya taṃ tato 'tijane visṛjet \
sa yathā tatra prāṅ vodaṅ vā adharāṅ vā pratyaṅ vā pradhmāyītābhinaddhākṣa ānīto 'bhinaddhākṣo visṛṣṭaḥ \\614.1\

1. ‘Just as, my dear, one might lead away from the Gandhāras a person with his eyes bandaged, and then abandon him in an uninhabited place; as there he might be blown forth either to the east, to the north, or to the south, since he had been led off with his eyes bandaged and deserted with his eyes bandaged; as, if one released his bandage and told him, “In that direction are the Gandhāras; go in that direction!” he would, if he were a sensible man, by asking [his way] from village to village, and being informed, arrive home at the Gandhāras—even so here on earth one who has a teacher knows: “I belong here only so long as I shall not be released [from the body]. Then I shall arrive home.”