Bhāgavata-Māhātmya and the Complete Summary of the Śrīmad-Bhāgavatam
यूयं द्विजाग्र्या बत भूरिभागा यच्छश्वदात्मन्यखिलात्मभूतम् । नारायणं देवमदेवमीश- मजस्रभावा भजताविवेश्य ॥ ५६ ॥
yūyaṁ dvijāgryā bata bhūri-bhāgā yac chaśvad ātmany akhilātma-bhūtam nārāyaṇaṁ devam adevam īśam ajasra-bhāvā bhajatāviveśya
O most eminent of brāhmaṇas, you are all indeed extremely fortunate, since you have already placed within your hearts Lord Śrī Nārāyaṇa — the Personality of Godhead, the supreme controller and the ultimate Soul of all existence — beyond whom there is no other god. You have undeviating love for Him, and thus I request you to worship Him.
This verse states that Lord Nārāyaṇa is the controller and the Soul of all beings, dwelling within the self as the indwelling Supersoul (Paramātmā).
Because they maintain uninterrupted devotion—constantly worshiping Nārāyaṇa, who is the supreme Lord and the inner witness of all.
By keeping steady remembrance of the Lord through daily śravaṇa and kīrtana, offering one’s work and choices to Him, and cultivating awareness of His presence within the heart.