Śrīmad-Bhāgavatam · Text 3.24.39
Who is speaking and story frame
मामात्मानं स्वयंज्योति: सर्वभूतगुहाशयम् ।
आत्मन्येवात्मना वीक्ष्य विशोकोऽभयमृच्छसि ॥ ३९ ॥
mām ātmānaṁ svayaṁ-jyotiḥ
sarva-bhūta-guhāśayam
ātmany evātmanā vīkṣya
viśoko ’bhayam ṛcchasi
In your own heart, through your intellect, you will always see Me, the supreme self-effulgent soul dwelling within the hearts of all living entities. Thus you will achieve the state of eternal life, free from all lamentation and fear.
Read Śrīla Prabhupāda's purport on Vedabase.io