Pradyumna: Bhurijana sent them. Bhurijana sent money for tickets to go to Columbus.
Prabhupāda: He has sent the tickets?
Pradyumna: Money.
Prabhupāda: Hm. So engage all yourselves in the service of Kṛṣṇa. It is very pleasing, and what is called encouraging, enlivening. After too much material enjoyment, the next stage is frustration. That stage is coming to your country. Therefore the boys are becoming hippies. After too much material enjoyment, the next stage is—that is natural-frustration.