The intellect that knows action and withdrawal from action, what should and should not be done, fear and fearlessness, bondage and liberation — that intellect, Partha, is sattvic.
प्रवृत्तिं च निवृत्तिं च कार्याकार्ये भयाभये | बन्धं मोक्षं च या वेत्ति बुद्धिः सा पार्थ सात्त्विकी ||१८-३०||