What metaphors does Chapter 52 use to explain the concept of non-duality and the devotee's union with the Guru?

Chapter 52 employs two distinct metaphors to illustrate the dissolution of duality when a devotee unites with the Guru. The first compares the devotee to a river and the Guru to the ocean, stating, "By embracing the ocean, the river forgets its river-ness." This signifies that upon taking refuge, the devotee's separate identity merges completely. The second metaphor, as described in Chapter 52, is that of two lamps becoming one: "Two lamps become one when they embrace; immediately the state of duality vanishes, And there is only one light in unity," beautifully depicting the state of oneness.