One verse

Srimad Bhagavatam 3.7.39

3.7.39

निमित्तानि च तस्येह प्रोक्तान्यनघसूरिभि: । स्वतो ज्ञानं कुत: पुंसां भक्तिर्वैराग्यमेव वा ॥ ३९ ॥

nimittani ca tasyeha proktany anagha-suribhih svato jnanam kutah pumsam bhaktir vairagyam eva va

nimittani
the source of knowledge
ca
also
tasya
of such knowledge
iha
in this world
proktani
mentioned
anagha
spotless
suribhih
by devotees
svatah
self-sufficient
jnanam
knowledge
kutah
how
pumsam
of the living entity
bhaktih
devotional service
vairagyam
detachment
eva
certainly
va
also.

Spotless devotees of the Lord have mentioned the source of such knowledge. How could one have knowledge of devotional service and detachment without the help of such devotees?