Chapter 11: Viśvarūpa-darśana-yoga: / Verse 13

Arjuna could see visually only Krishna’s gross body, for the eyes can see only the gross. The invisible sentient presence, the Self, is besides the body. What becomes the imagery before Arjuna’s mind is then the creation of the sentient presence, inward and subtle.

As the entire dream, which can also be of the extensive Universe, obviously subsists on the sleeper’s sentience, here too the entire scene rests on Arjuna’s sentience, specially effected by Krishna. Nothing else is there to be the source.

Whether anything can engender such manifold division yet abiding in the One, is a spiritual question Krishna has already dealt with in earlier chapters, especially from 7th onwards.