The understanding that knows engagement and withdrawal, engagement being the path of action, the round of scripturally enjoined objects, a cause of bondage, and withdrawal being the path of renunciation, a cause of liberation; since 'bondage' and 'liberation' stand in the same sentence, engagement and withdrawal are understood as the paths of action and of renunciation; and that knows what is to be done and what is not, the enjoined and the prohibited, in worldly and in Vedic matters, that is, what is to be performed and what is not, by one whose understanding rests on scripture, for whom and with what regard to place, time, and the rest, in the case of actions with a seen or an unseen end; and that knows what is to be feared and what is not, the cause of fear such as a thief or a tiger, and of fearlessness, in matters seen and unseen; the understanding that knows bondage with its cause and liberation with its cause, Partha, is of sattva. Here knowledge is a function of the understanding, and the understanding is what has functions; constancy too is just a particular function of the understanding.
Contemporary English rendering of the Sanskrit bhāṣya, pending scholar review.