Chapter 18 · Liberation through Renunciation · Krishna said
Bhagavad Gita 18.30 — Sattvic intellect
प्रवृत्तिं च निवृत्तिं च कार्याकार्ये भयाभये। बन्धं मोक्षं च या वेत्ति बुद्धिः सा पार्थ सात्त्विकी ॥
pravṛttiṃ ca nivṛttiṃ ca kāryākārye bhayābhaye | bandhaṃ mokṣaṃ ca yā vetti buddhiḥ sā pārtha sāttvikī ||
Meaning
The intellect that knows when to act and when to step back, what to do and what not to do, what to fear and what not to fear, what binds and what frees — that is sattvic.