In the material world a great man does not have time for insignificant men. But although the Lord is the greatest person, 
He sits in the heart of every living entity; thus He is the most merciful. The Lord said sarvasya caham hrdi sannivisto [BG 15.15]; I am seated in everyone’s heart.
Lord Kṛṣṇa is the ultimate shelter of even Nāra, or the Lord’s puruṣa expansion who creates the material world. The living entity is called nara, and the source of his material situation is Nāra, or Mahā-Viṣṇu. The word nārāyaṇa indicates that even Mahā-Viṣṇu finds His shelter in Kṛṣṇa, who is certainly supreme.
Courtesy: https://www.vedabase.com/en/sb/11/7/18
