In Lucknow University they were students. So there is a big building, and two, three snake-biting case happened. So some snake charmer was invited to find out the snake and take him. So he came. He came and took it away, the snake. Then this Dr. Gosh and his class friends, they were medical students. Naturally, the so-called modern scientist, they do not believe in all these things. So they became very inquisitive. All of them went to that snake charmer—he was a Muhammadan gentleman. So he knew that "These students, medical students, they have come to see the fun, how the snakes are charmed." So he inquired, "What is the matter? What is the magic that you can catch up snake and the snake cannot do any harm to you?" So he said it is possible by mantra. By mantra it can be done. So they challenged, "Oh, your snakes, I think they are poisonless and they cannot bite. There is no poison. The poison teeth, the fang, is taken away." "No, no. They have got everything." So he took one and showed that "Here is . . ." So to make a fun . . . He had many snakes. He let them all come out from the box. And immediately all over the courtyard, just like courtyard, they began to run over, and all these medical students, they became afraid. They were fleeing this side, that side, that side. (laughter) So the charmer said, "Don't be afraid. So long I am here they'll not bite you."
So this was spoken by Dr. Ghosh, a personal experience. The mantra has got so much power. But not that you purchase the mantra and chant. That will not. You have to make it perfect. There is process, how to become perfect in chanting the mantra. Similarly . . . It is an ordinary, material mantra. This spiritual mantra . . . I have already explained, this Hare Kṛṣṇa mantra is spiritual mantra. It is not material. Therefore, I've already explained, golokera prema-dhana hari-nāma-saṅkīrtana. It is not ordinary sound vibration, material sound vibration, radio. No. Spiritual. Golokera prema-dhana. So if we actually chant this Hare Kṛṣṇa mantra properly, without any offense, then once chanting is sufficient to make you free from the reaction of all sinful life. Once chanted. There is no question of chanting thousand times. It is said, eka hari-nāme jato pāpa hare, pāpī haya tato pāpa karibāre nare. Once chanting of Hare Kṛṣṇa mantra can vanquish so many . . . so much accumulated reaction of sinful life that a first-class pāpī or a very expert pāpī, he cannot commit so many pāpa. You see. It is so powerful.