750712 Lecture - Srila Prabhupada Speaks a Nectar Drop in Philadelphia

From Vanipedia

Nectar Drops from Srila Prabhupada
"We don't charge anything for selling Hare Kṛṣṇa mantra. We are chanting everywhere. That you saw, this Ratha-yātrā. Now, our only means is chanting Hare Kṛṣṇa. And these thousands of men are following simply by chanting Hare Kṛṣṇa mantra. So you can understand what is the potency of this Hare Kṛṣṇa mantra. We do not pay anything, you ladies and gentlemen, to follow us. But we simply chant Hare Kṛṣṇa.

So it is very potential. Narottama dāsa Ṭhākura, a great ācārya of Vaiṣṇava sampradāya, he has sung, golokera prema-dhana, hari-nāma-saṅkīrtana. This Hare Kṛṣṇa movement, or chanting of Hare Kṛṣṇa, it is not anything material. Therefore you will never feel tired chanting Hare Kṛṣṇa. You see practically. You go on chanting twenty-four hours, you will never feel tired."

750712 - Lecture Festival Ratha-yatra - Philadelphia