Kaṭha Upaniṣad 6.6

6.6

indriyāṇāṃ pṛthagbhāvam udayāstamayau ca yat /
pṛthag utpadyamānānāṃ matvā dhīro na śocati //

6. The separate nature of the senses,
And that their arising and setting
Is of things that come into being apart [from himself],
The wise man recognizes, and sorrows not.
7. Higher than the senses (indriya) is the mind (manas);
Above the mind is the true being (sattva).
Over the true being is the Great Self [i. e. buddhi, intellect];
Above the Great is the Unmanifest (avyakta).
8. Higher than the Unmanifest, however, is the Person
(Purusha),
All-pervading and without any mark (a-liṅga) whatever.
Knowing which, a man is liberated
And goes to immortality.
9. His form is not to be beheld.
No one soever sees Him with the eye.
He is framed by the heart, by the thought, by the mind.
They who know That become immortal.