One verse

Srimad Bhagavatam 7.10.49

7.10.49

स वा अयं ब्रह्म महद्विमृग्य- कैवल्यनिर्वाणसुखानुभूति: । प्रिय: सुहृद् व: खलु मातुलेय आत्मार्हणीयो विधिकृद्गुरुश्च ॥ ४९ ॥

sa va ayam brahma mahad-vimrgya- kaivalya-nirvana-sukhanubhutih priyah suhrd vah khalu matuleya atmarhaniyo vidhi-krd gurus ca

sah
that (Supreme Personality of Godhead, Krsna)
va
also
ayam
this
brahma
the impersonal Brahman (which is an emanation from Krsna)
mahat
by great personalities
vimrgya
searched for
kaivalya
oneness
nirvana-sukha
of transcendental happiness
anubhutih
the source of practical experience
priyah
very, very dear
suhrt
well-wisher
vah
of you
khalu
indeed
matuleyah
the son of a maternal uncle
atma
exactly like body and soul together
arhaniyah
worshipable (because He is the Supreme Personality of Godhead)
vidhi-krt
(yet He serves you as) an order carrier
guruh
your supreme advisor
ca
as well

The impersonal Brahman is Krsna Himself because Krsna is the source of the impersonal Brahman. He is the origin of the transcendental bliss sought by great saintly persons, yet He, the Supreme Person, is your most dear friend and constant well-wisher and is intimately related to you as the son of your maternal uncle. Indeed, He is always like your body and soul. He is worshipable, yet He acts as your servant and sometimes as your spiritual master.