06 One should not hear the holy name from a nondevotee
One must not hear the holy name chanted by non Vaisnavas:
Srila Sanatana Gosvami has forbidden us to hear the holy name of Krsna chanted by non−Vaisnavas, such as professional actors and singers, for it will have no effect. It is like milk touched by the lips of a serpent, as stated in the Padma Purana:
avaisnava−mukhodgirnam putam hari−kathamrtam
sravanam naiva kartavyam sarpocchistam yatha payah
– Sri Caitanya caritamrta Antya lila 1.101
One should avoid hearing the Hare Krsna mantra chanted by a nondevotee:
As far as possible, chanting from the lips of nondevotees should be avoided. Milk touched by the lips of a serpent has poisonous effects.
– The Science of Self Realization