One verse

Srimad Bhagavatam 11.2.37

11.2.37

भयं द्वितीयाभिनिवेशत: स्या- दीशादपेतस्य विपर्ययोऽस्मृति: । तन्माययातो बुध आभजेत्तं भक्त्यैकयेशं गुरुदेवतात्मा ॥ ३७ ॥

bhayaṁ dvitīyābhiniveśataḥ syād īśād apetasya viparyayo ’smṛtiḥ tan-māyayāto budha ābhajet taṁ bhaktyaikayeśaṁ guru-devatātmā

bhayam
fear
dvitīya
in something seeming to be other than the Lord
abhiniveśataḥ
because of absorption
syāt
it will arise
īśāt
from the Supreme Lord
apetasya
for one who has turned away
viparyayaḥ
misidentification
asmṛtiḥ
forgetfulness
tat
of the Lord
māyayā
by the illusory energy
ataḥ
therefore
budhaḥ
an intelligent person
ābhajet
should worship fully
tam
Him
bhaktyā
with devotion
ekayā
unalloyed
īśam
the Lord
guru-devatā-ātmā
one who sees his own spiritual master as his lord and very soul

Fear arises when a living entity misidentifies himself as the material body because of absorption in the external, illusory energy of the Lord. When the living entity thus turns away from the Supreme Lord, he also forgets his own constitutional position as a servant of the Lord. This bewildering, fearful condition is effected by the potency for illusion, called māyā. Therefore, an intelligent person should engage unflinchingly in the unalloyed devotional service of the Lord, under the guidance of a bona fide spiritual master, whom he should accept as his worshipable deity and as his very life and soul.