One verse

Srimad Bhagavatam 4.29.16

4.29.16

अन्त:पुरं च हृदयं विषूचिर्मन उच्यते । तत्र मोहं प्रसादं वा हर्षं प्राप्नोति तद्गुणै: ॥ १६ ॥

antah-puram ca hrdayam visucir mana ucyate tatra moham prasadam va harsam prapnoti tad-gunaih

antah-puram
private residence
ca
and
hrdayam
the heart
visucih
the servant named Visucina
manah
the mind
ucyate
is said
tatra
there
moham
illusion
prasadam
satisfaction
va
or
harsam
jubilation
prapnoti
obtains
tat
of the mind
gunaih
by the modes of nature.

The word antah-pura refers to the heart. The word visucina, meaning going everywhere indicates the mind. Within the mind the living entity enjoys the effects of the modes of material nature. These effects sometimes cause illusion, sometimes satisfaction and sometimes jubilation.