In his Bhakti-sandarbha, Jīva Gosvāmī states:
tad evaṁ tat-tad-abhimāna-lakṣaṇa-bhāva-viśeṣeṇa svābhāvika-rāgasya vaiśiṣṭye sati tat-tad-rāga-prayuktā śravaṇa-kīrtana-smaraṇa-pāda-sevana-vandanātma-nivedana-prāyā bhaktis teṣāṁ rāgātmikā bhaktir ity ucyate. . . . tatas tadīyaṁ rāgaṁ rucyānugacchantī sā rāgānugā.
When a pure devotee follows the footsteps of a devotee in Vṛndāvana, he develops rāgānugā bhakti.