Text:

विज्ञानसारथिर्यस्तु मनःप्रग्रहवान्नरः ।
सोऽध्वनः पारमाप्नोति तद्विष्णोः परमं पदम् ॥ ९ ॥

vijñānasārathiryastu manaḥpragrahavānnaraḥ |
so’dhvanaḥ pāramāpnoti tadviṣṇoḥ paramaṃ padam || 9 ||

9. But the man who has a discriminating intellect for the driver and a controlling mind for the reins, reaches the end of the road, i.e., that highest place of Vishnu.

Shankara’s Commentary:

What that goal is, is now explained; but the man who has discerning intelligence for the driver, whose mind is under control, and who is clean, i.e., the knowing man reaches the end of the road of Samsara, i.e., realises the Supreme; i.e., is absolved from all the ties of Samsara. The man of knowledge attains the highest place of Vishnu, i.e., the nature of the all-pervading Brahman, the Paramatman known as Vasudeva (the Self-luminous).