This morning I was reading from the Srimad Bhagavatam, First Canto, Chapter 7, entitled “The Son of Drona Punished”. This chapter has always intrigued me, because although the Srimad Bhagavatam was compiled by Srila Vyasedeva five thousand years ago, there is mention of the ultimate weapon, the brahmāstra [nuclear weapon] being used. We think that Atomic energy or Nuclear energy is some modern technological advancement, but actually this knowledge has been around since the time that Srimad Bhagavatam was first spoken, many thousands of years ago.
…The brahmāstra is similar to the modern nuclear weapon manipulated by atomic energy. The atomic energy works wholly on total combustibility, and so the brahmāstra also acts. It creates an intolerable heat similar to atomic radiation, but the difference is that the atomic bomb is a gross type of nuclear weapon, whereas the brahmāstra is a subtle type of weapon produced by chanting hymns. It is a different science, and in the days gone by such science was cultivated in the land of Bhārata-varṣa. The subtle science of chanting hymns is also material, but it has yet to be known by the modern material scientists. Subtle material science is not spiritual, but it has a direct relationship with the spiritual method, which is still subtler. A chanter of hymns knew how to apply the weapon as well as how to retract it. That was perfect knowledge. (from purport to SB 1.7.28)
…The theory that the modern atomic bomb explosions can annihilate the world is childish imagination. First of all, the atomic energy is not powerful enough to destroy the world. And secondly, ultimately it all rests on the supreme will of the Supreme Lord because without His will or sanction nothing can be built up or destroyed. It is foolish also to think that natural laws are ultimately powerful. Material nature’s law works under the direction of the Lord, as confirmed in the Bhagavad-gītā. The Lord says there that natural laws work under His supervision. The world can be destroyed only by the will of the Lord and not by the whims of tiny politicians. Lord Śrī Kṛṣṇa desired that the weapons released by both Drauṇi and Arjuna be withdrawn, and it was carried out by Arjuna at once. Similarly, there are many agents of the all-powerful Lord, and by His will only can one execute what He desires. (from purport to 1.7.32)