"Caitanya Mahāprabhu also has His astra, weapon. The astra means to, I mean to say, paritrāṇāya sādhūnāṁ vināśāya ca duṣkṛtam (BG 4.8). So this astra, what is that? Saṅkīrtana. Saṅkīrtanaiḥ. Yajñaiḥ saṅkīrtanaiḥ prāyair yajanti hi (SB 11.5.32). This Hare Kṛṣṇa movement is also astra of Kṛṣṇa for killing the demons, but it is not like a..., like a sword. It is not active. But it is astra. It is killing the demons, but in a different way. The demonic habits are being killed, demonic habits. Everyone, we can understand it how our demonic activities are being killed by this Hare Kṛṣṇa movement. This is astra. This is an astra, but it is being used in a different way, because in this age they are so fallen. So... Manda, manda-bhāgyā. This real astra weapon cannot be used upon them. It is already dead. So therefore another type of astra to awaken them to life, that is Hare Kṛṣṇa, mahā-mantra astra. Otherwise they are already dead. A dead horse... "Beating the dead horse." A horse is dead; what you will get by beating with whips? It is already dead. So there are big, big demons. Hiraṇyakaśipu, he was required to be killed by the nails of the Lord. He appeared as a ferocious lion. But here, the teeny demons, there is no need of nails or any sword. They are to be awakened simply by Kṛṣṇa consciousness, chanting Hare Kṛṣṇa."

76-04-02 Lecture on the Srimad Bhagavatam, VRNDAVAN - April 02, 1976