CC Madhya 19.177

The Bhakti-rasāmṛta-sindhu (1.2.2) gives the following information about sādhana-bhakti:

The process of devotional service — beginning with chanting and hearing — is called sādhana-bhakti. This includes the regulative principles that are intended to awaken one to devotional service. Devotional service is always dormant in everyone’s heart, and by the offenseless chanting of the holy names of the Lord, one’s original dormant Kṛṣṇa consciousness is awakened. This awakening to Kṛṣṇa consciousness is the beginning of sādhana-bhakti. This can be divided into many different parts, including faith, association with devotees, initiation by the spiritual master, engagement in devotional service under the instructions of a spiritual master, steadiness in devotional service and the awakening of a taste for devotional service. In this way, one can become attached to Kṛṣṇa and His service, and when this attachment is intensified, it results in ecstatic love for Kṛṣṇa. The word rati is explained in the Bhakti-rasāmṛta-sindhu (1.3.41) as follows:

“When a tenderness of the heart is manifested, there is rati, or attachment. But those who are interested in being liberated from material bondage will not manifest this tenderness.” This attachment is not like material attachment. When one is free of material contamination, attachment for Kṛṣṇa’s service awakens and is called rati. In the material world there is attachment for material enjoyment, but this is not rati. Transcendental rati can be awakened only on the spiritual platform. Ecstatic love for Kṛṣṇa (prema) is described in the Bhakti-rasāmṛta-sindhu (1.41) as follows:

“When the heart is completely softened and devoid of all material desires and when one’s emotional feelings become very strong, one becomes very much attached to Kṛṣṇa. Such purified emotion is known as pure love.”