One verse

Srimad Bhagavatam 3.25.44

3.25.44

एतावानेव लोकेऽस्मिन् पुंसां नि:श्रेयसोदय: । तीव्रेण भक्तियोगेन मनो मय्यर्पितं स्थिरम् ॥ ४४ ॥

etavan eva loke ’smin pumsam nihsreyasodayah tivrena bhakti-yogena mano mayy arpitam sthiram

etavan eva
only so far
loke asmin
in this world
pumsam
of men
nihsreyasa
final perfection of life
udayah
the attainment of
tivrena
intense
bhakti-yogena
by practice of devotional service
manah
mind
mayi
in Me
arpitam
fixed
sthiram
steady.

Therefore persons whose minds are fixed on the Lord engage in the intensive practice of devotional service. That is the only means for attainment of the final perfection of life.