Bhagavad Gita 18.30
That intellect which understands the creation and dissolution of life, what actions should be done and what not, which discriminates between fear and fearlessness, bondage and deliverance, is Pure.
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||
English translation (above): Shri Purohit Swami (1935), public domain. Sanskrit text via github.com/gita/gita (Unlicense).