Bhūmi, the earth—the iron, stone, wood, they are nothing but transformation of earth. Similarly, vapo, water. So whatever we are manufacturing here, they are simply combination of earth, water, air, fire, that's all. Nothing but. Tejo-vāri-mṛdāṁ vinimayam (SB 1.1.1). Vinimaya, exchange of teja, fire. Teja means fire, vāri means water, and mṛd means earth. Just like the bricks. What is this brick? You take earth, you take earth and mix it with water and put it in the fire, it becomes brick. So whole thing, either earth, stone or iron, anything, they are simply mixture of these five elements.
So I am spirit soul. I have been engaged in mixing these five things and big, big lumps, and gathering them just like children play in the sea beach, gathering so much sand and making like this, big house, and then it is fallen down. So we are engaged in these material activities, but we forget at the same time that there is, ready, atom bomb. As soon as there will be declared war, these things will be finished, immediately.
These people are not declaring war. America is not declaring war against Asia, Russia or China. They are thinking, because they know they have got the deadly weapons, atom, and that is the now diplomacy. When there will be war, the first dropping of atom bomb will be victorious. "Aah, victorious."
So this is called material civilization, that we do not know that these things will be finished today or tomorrow or hundred years after. It will be finished