What is vibhuti yoga in the Bhagavad Gita?

Vibhuti yoga is Chapter 10 of the Bhagavad Gita, "The Yoga of Divine Manifestations." Arjuna asks Krishna to describe his glories more fully, and Krishna responds with a long list of the forms through which his presence can be recognized in the world: "among the Adityas I am Vishnu, among lights I am the radiant sun... among the stars I am the moon" (10.21); among mountains he is Meru, among bodies of water the ocean, among sages Bhrigu, among rivers the Ganges (10.23-31). He identifies himself as the syllable Om among words, the gambling of the fraudulent and the splendor of the splendid, the strength of the strong who are free from passion and desire. Krishna sums up the pattern in verse 10.41: whatever being has glory, beauty, or power springs from a mere spark of his own splendor, and in 10.42 he adds that no finite catalog could ever capture it, since a single fragment of himself pervades and sustains the entire universe. This chapter is distinct from Krishna's universal-form vision in Chapter 11 (the vishvarupa Arjuna is granted through divine sight): Chapter 10 is a teaching about recognizing the divine distributed throughout ordinary, familiar excellence — the best of any category, from rivers to seasons to human virtues — rather than a single overwhelming cosmic vision. The point for Arjuna, and for the reader, is a shift in perception: once you can see the infinite reflected in the finest instance of anything, devotion becomes a way of seeing the whole world rather than a separate religious activity.