One verse

Srimad Bhagavatam 3.12.19

3.12.19

तपसैव परं ज्योतिर्भगवन्तमधोक्षजम् । सर्वभूतगुहावासमञ्जसा विन्दते पुमान् ॥ १९ ॥

tapasaiva param jyotir bhagavantam adhoksajam sarva-bhuta-guhavasam anjasa vindate puman

tapasa
by penance
eva
only
param
the supreme
jyotih
light
bhagavantam
unto the Personality of Godhead
adhoksajam
He who is beyond the approach of the senses
sarva-bhuta-guha-avasam
residing in the heart of all living entities
anjasa
completely
vindate
can know
puman
a person.

By penance only can one even approach the Personality of Godhead, who is within the heart of every living entity and at the same time beyond the reach of all senses.