Therefore, with the sword of knowledge cut away this doubt, the most sinful one, born of ignorance, born of want of discernment, lodged in the heart, in the intellect: the right vision, the knowledge that removes faults such as sorrow and delusion, is itself the sword, the blade, and with that sword of knowledge cut away the doubt about your own Self, since the doubt has the Self for its object. A doubt belonging to another does not become a thing to be cut by another, such that it would need to be specified as one's own; so, even though it has the Self for its object, it is still one's own. Having cut away this doubt, the cause of your own ruin, take your stand on yoga, the means to the right vision, the performance of action; rise up now for battle, O Bhārata. Thus ends the fourth chapter in the commentary on the Bhagavad Gītā composed by the most reverend Śaṅkara the Blessed, pupil of the most reverend Govinda the Blessed whose feet are worthy of worship, the venerable wandering ascetic of the supreme order.

This is a brief sub-gloss. For a fuller reading of this verse, see Madhusūdana, Śaṅkara, or Rāmānuja above.

Therefore, having cut, with the sword of knowledge of the self that I have taught, the doubt regarding the self that dwells in the heart, born of beginningless ignorance, take your stand on the discipline of action that I have taught; rise up for its sake, Bharata.

This is a brief sub-gloss. For a fuller reading of this verse, see Madhusūdana, Śaṅkara, or Rāmānuja above.

Madhvacharya does not comment on this verse.