Devotee: He wants to know how we can increase our desire for saṅkīrtana.
Prabhupāda: By performing saṅkīrtana. Just like if a man drinks and if he drinks, drinks, then you become a drunkard. (laughter) Drink more and you become drunkard. Similarly, chant more and you become perfect chanter.
(Srila Prabhupada Lecture, Mexico, February 11, 1975)