One verse

Srimad Bhagavatam 4.22.32

4.22.32

नात: परतरो लोके पुंस: स्वार्थव्यतिक्रम: । यदध्यन्यस्य प्रेयस्त्वमात्मन: स्वव्यतिक्रमात् ॥ ३२ ॥

natah parataro loke pumsah svartha-vyatikramah yad-adhy anyasya preyastvam atmanah sva-vyatikramat

na
not
atah
after this
paratarah
greater
loke
in this world
pumsah
of the living entities
sva-artha
interest
vyatikramah
obstruction
yat-adhi
beyond that
anyasya
of others
preyastvam
to be more interesting
atmanah
for the self
sva
own
vyatikramat
by obstruction.

There is no stronger obstruction to one’s self-interest than thinking other subject matters to be more pleasing than one’s self-realization.