(Click to enlarge photo of Srila Prabhupada and devotees, San Francisco Rathayatra, 1974)
Devotee: Is showing miracles like some svāmīs do the way to bring people back to spiritual life?
Prabhupāda: Why should I show miracles? What is the business? I have to speak the truth, that's all. What is the use of miracle? When you go to college or school, we want to see miracles, or you learn books and knowledge? Kṛṣṇa never said that you go to a guru who can perform miracles. (laughter) He never said that. He said,
tad viddhi praṇipātena
upadekṣyanti tad jñānaṁ
Go to a jñānī, and who has known the truth, not to a jugglers, magician. Science is not magic. Science is knowledge. That is the Vedic injunction. Tad vijñānārtham: in order to understand that science, not to see jugglery and magic. The jugglery and magic is here present: all these meat-eaters, drunkards, woman-hunters, now Vaiṣṇava. This is real magic. If you have got eyes to see, see the magic. If you are blind, then that is different question. This is magic.
(Srila Prabhupada Lecture, Hyderabad, April 12, 1975)