Since the fault in the engagement of the senses has been set out, therefore, O mighty-armed one, of that ascetic whose senses are restrained on every side, by every means, of mind and the rest, from the sense-objects, sound and the rest, the insight is well established. This behaviour, worldly and Vedic, ceases for one of settled insight in whom discerning knowledge has arisen, since it is the effect of ignorance; with the cessation of ignorance it ceases, and ignorance ceases because it is opposed to knowledge. Making this clear, He says.

Therefore, for one whose mind is, in the manner described, set on Me the auspicious resort, and whose senses are held back wholly from the objects of the senses, his wisdom alone is well established in the self. The Lord states the attainment of one whose senses are so restrained and whose mind is serene.

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

Therefore, Krishna concludes, only one whose senses are restrained in every way is a man of knowledge; this he settles with 'therefore'.