eteka - thus; cintite - thinking; rādhāra - of Śrīmatī Rādhārāṇī; nirmala hṛdaya - possessing a pure heart; svābhāvika - natural; premāra - of love of Kṛṣṇa; svabhāva - the character; karila udaya - awakes.

While Śrīmatī Rādhārāṇī was thinking in this way, the characteristics of natural love became manifest because of Her pure heart.