Bhagavad Gita · Chapter 13: The Field and the Knower of the Field

Bhagavad Gita 13.30

yadā bhūtapṛthagbhāvamekasthamanupaśyati | tata eva ca vistāraṃ brahma sampadyate tadā ||

When a person sees the separate existence of all beings as resting in the One, and as spreading out from that One alone, then that person attains Brahman.

Modern context

When a person sees the many beings as resting in the One, and as spreading out from the One, they reach the absolute. Not denying the many, and not losing the One, but seeing both at once. It is like seeing a great tree: countless leaves, and one root. The vision holds variety and unity together.