One verse

Srimad Bhagavatam 1.5.18

1.5.18

तस्यैव हेतो: प्रयतेत कोविदो न लभ्यते यद्भ्रमतामुपर्यध: । तल्लभ्यते दु:खवदन्यत: सुखं कालेन सर्वत्र गभीररंहसा ॥ १८ ॥

tasyaiva hetoh prayateta kovido na labhyate yad bhramatam upary adhah tal labhyate duhkhavad anyatah sukham kalena sarvatra gabhira-ramhasa

tasya
for that purpose
eva
only
hetoh
reason
prayateta
should endeavor
kovidah
one who is philosophically inclined
na labhyate
is not obtained
yat
what
bhramatam
wandering
upari adhah
from top to bottom
tat
that
labhyate
can be obtained
duhkhavat
like the miseries
anyatah
as a result of previous work
sukham
sense enjoyment
kalena
in course of time
sarvatra
everywhere
gabhira
subtle
ramhasa
progress

Persons who are actually intelligent and philosophically inclined should endeavor only for that purposeful end which is not obtainable even by wandering from the topmost plane (Brahmaloka) down to the lowest planet (Patala). As far as happiness derived from sense enjoyment is concerned, it can be obtained automatically in course of time, just as in course of time we obtain miseries even though we do not desire them.