One verse

Srimad Bhagavatam 7.1.27

7.1.27

यथा वैरानुबन्धेन मर्त्यस्तन्मयतामियात् । न तथा भक्तियोगेन इति मे निश्चिता मति: ॥ २७ ॥

yatha vairanubandhena martyas tan-mayatam iyat na tatha bhakti-yogena iti me niscita matih

yatha
as
vaira-anubandhena
by constant enmity
martyah
a person
tat-mayatam
absorption in Him
iyat
may attain
na
not
tatha
in a like manner
bhakti-yogena
by devotional service
iti
thus
me
my
niscita
definite
matih
opinion.

Narada Muni continued: By devotional service one cannot achieve such intense absorption in thought of the Supreme Personality of Godhead as one can through enmity toward Him. That is my opinion.