This is a brief sub-gloss. For a fuller reading of this verse, see Madhusūdana, Śaṅkara, or Rāmānuja above.
Whenever there is a flagging, a decline, of dharma, the dharma marked as the order of class and stage of life, the means to the prosperity and the highest good of living beings, and a rising-up, an upsurge, of adharma, O Bhārata, then I send Myself forth by māyā.
Contemporary English rendering of the Sanskrit bhāṣya, pending scholar review.