Srimad Bhagavatam Canto 07, Chapter 07, Text 33

SB 7.7.33

evam nirjita-sad-vargaih
 kriyate bhaktir isvare
vasudeve bhagavati
 yaya samlabhyate ratih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
By these activities [as mentioned above] one is able to cut down the influence of the enemies, namely lust, anger, greed, illusion, madness and jealousy, and when thus situated, one can render service to the Lord. In this way one surely attains the platform of loving service to the Supreme Personality of Godhead.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
As mentioned in verses thirty and thirty-one, one’s first duty is to approach the spiritual master, the representative of the Supreme Personality of Godhead, to begin rendering service to him. Prahlada Maharaja proposed that from the very beginning of life (kaumara acaret prajñah) a small child should be trained to serve the spiritual master while living at the gurukula. Brahmacari gurukule vasan danto guror hitam (Bhag. 7.12.1). This is the beginning of spiritual life. Guru-padasrayah, sadhu-vartmanuvartanam, sad-dharma-prccha. By following the instructions of the guru and the sastras, the disciple attains the stage of devotional service and becomes unattached to possessions. Whatever he possesses he offers to the spiritual master, the guru, who engages him in sravanam kirtanam visnoh. The disciple follows strictly and in this way learns how to control his senses. Then, by using his pure intelligence, he gradually becomes a lover of the Supreme Personality of Godhead, as confirmed by Srila Rupa Gosvami (adau sraddha tatah sadhu-sangah). In this way one’s life becomes perfect, and his attachment for Krsna becomes positively manifested. In that stage, he is situated in ecstasy, experiencing bhava and anubhava, as explained in the following verse.
Srimad Bhagavatam Canto 07, Chapter 07, Text 32
Srimad Bhagavatam Canto 07, Chapter 07, Text 34