Initial (Books)
Srimad-Bhagavatam
SB Canto 1
SB 1.6.16, Translation and Purport:
As soon as I began to meditate upon the lotus feet of the Personality of Godhead with my mind transformed in transcendental love, tears rolled down my eyes, and without delay the Personality of Godhead Śrī Kṛṣṇa appeared on the lotus of my heart.
The word bhāva is significant here. This bhāva stage is attained after one has transcendental affection for the Lord. The first initial stage is called śraddhā, or a liking for the Supreme Lord, and in order to increase that liking one has to associate with pure devotees of the Lord. The third stage is to practice the prescribed rules and regulations of devotional service. This will dissipate all sorts of misgivings and remove all personal deficiencies that hamper progress in devotional service.