What Does 'Unlimitedly Merciful' Mean?

Only Kṛṣṇa can deliver us from this material existence. Indeed, He is always trying to deliver us. Īśvaraḥ sarva-bhūtānāṁ hṛd-deśe 'rjuna tiṣṭhati [Bg. 18.61]. He is within our hearts and is not at all inattentive. His only aim is to deliver us from material life. It is not that He becomes attentive to us only when we offer prayers to Him. Even before we offer our prayers, He incessantly tries to deliver us. He is never lazy in regard to our deliverance.

Therefore this verse says, bhūri-karuṇāya namo 'layāya. It is the causeless mercy of the Supreme Lord that He always tries to bring us back home, back to Godhead.

God is liberated, and He tries to make us liberated, but although He is constantly trying, we refuse to accept His instructions (sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja [Bg. 18.66]). Nonetheless, He has not become angry. Therefore He is described here as bhūri-karuṇāya, unlimitedly merciful in delivering us from this miserable material condition of life and taking us back home, back to Godhead.

- Purport to Srimad Bhagavatam 8.3.17