This knowledge of Brahman, about to be told and also told in the earlier chapters: bringing it to mind, He says 'this'. The word 'tu', 'but', serves to single it out. This very thing, right knowledge, is the direct means to the attainment of liberation, by such scriptures and remembered texts as 'Vāsudeva is all', 'all this is the Self alone' (Bṛhadāraṇyaka 2.4.6), 'one only, without a second' (Chāndogya 6.2.1), and not anything else, and by such scriptures as 'now those who know otherwise than this are ruled by others, and their worlds perish'. To you I shall declare, shall tell, the most secret, the most hidden thing, you who are free of fault-finding. What knowledge is it? Of what character? Together with discernment, joined with direct experience. Knowing which, attaining which, you shall be freed from what is inauspicious, from the bondage of transmigration. And that knowledge.

The Blessed Lord spoke. But this knowledge, the most secret, called worship, having the form of devotion, together with discernment, that is, together with the particular knowledge of the manner and the goal of the worship, I shall declare to you, who do not cavil. To you, who, having heard the glory of Me, of a kind unlike all else and of measureless ways, hold 'it is indeed just so', I shall declare it. This is the meaning. Knowing which knowledge, on to its carrying out, you will be freed of all the inauspicious that obstructs the attaining of Me.

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

Salutation to the glorious Ranganatha. Om. In this chapter Krishna makes clear what was said in the seventh chapter.