One verse

Srimad Bhagavatam 7.2.49

7.2.49

अथ नित्यमनित्यं वा नेह शोचन्ति तद्विद: । नान्यथा शक्यते कर्तुं स्वभाव: शोचतामिति ॥ ४९ ॥

atha nityam anityam va neha socanti tad-vidah nanyatha sakyate kartum sva-bhavah socatam iti

atha
therefore
nityam
the eternal spirit soul
anityam
the temporary material body
va
or
na
not
iha
in this world
socanti
they lament for
tat-vidah
those who are advanced in knowledge of the body and soul
na
not
anyatha
otherwise
sakyate
is able
kartum
to do
sva-bhavah
the nature
socatam
of those prone to lamentation
iti
thus.

Those who have full knowledge of self-realization, who know very well that the spirit soul is eternal whereas the body is perishable, are not overwhelmed by lamentation. But persons who lack knowledge of self-realization certainly lament. Therefore it is difficult to educate a person in illusion.