Devotee: We say that Kṛṣṇa is present within the spiritual, within the heart of the living entity.
Prabhupāda: Kṛṣṇa is present everywhere.
Devotee: As a person or as an energy?
Prabhupāda: In His energy. Also person. person we cannot see with the present eyes, but energy we can feel. Clear this point more and more. So when fully realized, then this verse, that everything is brahma, sarvaṁ khalv idaṁ brahma... The advanced devotee, he does not see anything except Kṛṣṇa.