By His (Krsna's) impersonal feature He expands the rays of the brahmajyoti, which is limitless and all-pervasive

Expressions researched:
"by His impersonal feature He expands the rays of the brahmajyoti, which is limitless and all-pervasive. Part of this all-pervasive brahmajyoti, which is compared to the sun rays, is covered by the darkness of the mahat-tattva, and this insignificant part is known as the material world"

Srimad-Bhagavatam

SB Canto 2

For the pure devotees He is the constant companion, as in the case of His becoming one of the family members of the Yadu dynasty, or His becoming the friend of Arjuna, or His becoming the associate neighbor of the inhabitants of Vṛndāvana, as the son of Nanda-Yaśodā, the friend of Sudāmā, Śrīdāmā and Madhumaṅgala, or the lover of the damsels of Vrajabhūmi, etc. That is part of His personal features. And by His impersonal feature He expands the rays of the brahmajyoti, which is limitless and all-pervasive.

SB 2.4.14, Translation and Purport

Let me offer my respectful obeisances unto Him who is the associate of the members of the Yadu dynasty and who is always a problem for the nondevotees. He is the supreme enjoyer of both the material and spiritual worlds, yet He enjoys His own abode in the spiritual sky. There is no one equal to Him because His transcendental opulence is immeasurable.

There are two sides of the transcendental manifestations of the Supreme Lord, Śrī Kṛṣṇa. For the pure devotees He is the constant companion, as in the case of His becoming one of the family members of the Yadu dynasty, or His becoming the friend of Arjuna, or His becoming the associate neighbor of the inhabitants of Vṛndāvana, as the son of Nanda-Yaśodā, the friend of Sudāmā, Śrīdāmā and Madhumaṅgala, or the lover of the damsels of Vrajabhūmi, etc.