Chāndogya Upaniṣad 7.3

7.3.1

mano vāva vāco bhūyaḥ \
yathā vai dve vāmalake dve vā kole dvau vā akṣau muṣṭir anubhavaty evaṃ vācaṃ ca nāma ca mano 'nubhavati \
sa yadā manasā manasyati mantrān adhīyīyety athādhīte \
karmāṇi kurvīyety atha kurute \
putrāṃś ca paśūṃś ceccheyety athecchate \
imaṃ ca lokam amuṃ ceccheyety athecchate \
mano hy ātmā \
mano hi lokaḥ \
mano hi brahma \
mana upāssveti \\703.1\

1. ‘Mind (*manas*), assuredly, is more than Speech. Verily, as the closed hand compasses two acorns, or two kola-berries, or two dice-nuts, so Mind compasses both Speech and Name. When through Mind one has in mind “I wish to learn the sacred sayings (*mantra*),” then he learns them; “I wish to perform sacred works (*karma*),” then he performs them; “I would desire sons and cattle,” then he desires them; “I would desire this world and the yonder,” then he desires them. Truly the self (*ātman*) is Mind. Truly, the world (*loka*) is Mind. Truly, Brahma is Mind.

7.3.2

sa yo mano brahmety upāste \
yāvan manaso gataṃ tatrāsya yathākāmacāro bhavati yo mano brahmety upāste \
asti bhagavo manaso bhūya iti \
manaso vāva bhūyo 'stīti \
tan me bhagavān bravītv iti \\703.2\

2. He who reverences Mind as Brahma—as far as Mind goes, so far he has unlimited freedom, he who reverences Mind as Brahma.’

‘Is there, Sir, more than Mind?’

‘There is, assuredly, more than Mind.’

‘Do you, Sir, tell me it.’