Bhagavad Gita, Chapter 3, Verse 42

इन्द्रियाणि पराण्याहुरिन्द्रियेभ्यः परं मनः । मनसस्तु परा बुद्धिर्यो बुद्धेः परतस्तु सः

indriyāṇi parāṇyāhurindriyebhyaḥ paraṃ manaḥ | manasastu parā buddhiryo buddheḥ paratastu saḥ

Translation

They say that the senses are superior: superior to the senses is mind: superior to mind is reason; one who is even superior to reason is He.

— Alladi Mahadeva Sastri

Word meanings

indriyāṇi
the senses
parāṇi
superior
āhuḥ
(they) say
indriyebhyaḥ
than the senses
param
superior
manaḥ
mind
manasaḥ
than the mind
tu
indeed
parā
superior
buddhiḥ
the Reason
yaḥ
who
buddheḥ
than the Reason
parataḥ
greater
tu
indeed
saḥ
he

Śaṅkarācārya's commentary

The senses are five. When compared with the physical body, which is gross, external, and limited, the senses are superior as they are comparatively more subtle and internal, and have a more extensive sphere of action. Superior to the senses is mind (manas) which is composed of thoughts and desires, of errors and doubts (saṃkalpa and vikalpa). Superior to mind is reason (buddhi) characterized by determination (niścaya). So, He who is behind all things visible, inclusive of reason — the Dweller in the body — He, the Self, the witness of reason, is superior to reason.