Bhagavad Gita, Chapter 6, Verse 25

शनैः शनैरुपरमेद् बुद्ध्या धृतिगृहीतया । आत्मसंस्थं मनः कृत्वा न किञ्चिदपि चिन्तयेत्

śanaiḥ śanairuparamed buddhyā dhṛtigṛhītayā | ātmasaṃsthaṃ manaḥ kṛtvā na kiñcidapi cintayet

Translation

Little by little let him withdraw, by reason (buddhi) held in firmness; keeping the mind established in the Self, let him not think of anything.

— Alladi Mahadeva Sastri

Word meanings

śanaiḥ
gradually
śanaiḥ
gradually
uparamet
let (him) cease (from activity)
buddhyā
by the reason
dhṛtigṛhītayā
by firmness, (by) seized
ātmasaṃstham
self-seated
manaḥ
the mind
kṛtvā
having made
na
not
kiñcit
anything
api
also
cintayet
let him think

Śaṅkarācārya's commentary

He should make the mind constantly abide in the Self, bearing in mind that the Self is all and that nothing else exists. This is the highest form of Yoga.