"America is finished. They cannot do anything anymore. Neither industrialists nor big scholars, neither big fighter. Anything. Simply spoiled. The only shelter is this Kṛṣṇa consciousness. Pāpi tāpi yata chilo harināme uddharilo. They can be only saved by this process. They have no other... otherwise they are going to hell. All Americans, the so-called puffed up materialist. This is a fact. So if you want to do service to your country, introduce this Kṛṣṇa consciousness to the younger generation. They will be saved. You be saved and save your brothers."
(Srila Prabhupada Conversation, London August 15, 1971)
"This material world, it has got a date of its creation. Just like your body, it has got a date of its creation. It stays for some time, and again there is a date of its dissolution. You take the history of everything material, either you take this body, or take this world, or take any empire or any... Just like your American country, oh, it has a date of its beginning. Now it is staying. Now it will be, some day will come, there will be no more America. You should know it. That means, that is nature's law. Everything. Everything is born, it stays for some time, then it is dissolute, dissolved. That is explained in the Bhagavad-gītā, bhūtvā bhūtvā pralīyate (BG 8.19). Bhūtvā bhūtvā pralīyate. All this thing, whatever material, that manifests, it comes out, it is manifested. It... Just like bubbles in the ocean. There are millions and millions bubbles created one second, and next second, it is finished."
(Srila Prabhupada Lecture, San Francisco, February 6, 1967)
"That is the way of material civilization too much depending on machine. At any time the whole thing may collapse and therefore we may not be self complacent depending so much on artificial life. The modern life of civilization depends wholly on electricity and petrol and both of them are artificial for man."
(Srila Prabhupada Letter, November 13, 1965)
"I can understand your concern about the deterioration of the civilization. Yes, the city will be more dangerous place as Kali-yuga advances. It will be very deteriorating. The modern civilization is so corrupt and as sinful activities are more and more committed, the people will be forced to face more troubles, by nature's order. Our business, however, is simply to take shelter of the Hare Krsna Maha Mantra and pray to the Holy Name to give us protection. We shall be unaffected by all that will happen. Krsna will provide us with working facilities. Be assured of this, that the devotees will be protected by the Holy Name. Others will have to suffer in the days that are coming."
(Srila Prabhupada Letter, July 23, 1973)
"So, my dear boys and girls, about six years ago I came to your country single-handed, with these pair of cymbal. Now you are so many chanting Hare Kṛṣṇa. That is my success. It was the prediction of Lord Caitanya Mahāprabhu,
pṛthivīte āche yata nagarādi grāma
sarvatra pracāra hoibe mora nāma
(CB Antya-khaṇḍa 4.126)
Lord Caitanya desired that 'In all the towns, in as many towns and villages as they are on the surface of the globe, My name will be broadcast.' He is Kṛṣṇa Himself, svayaṁ kṛṣṇa, kṛṣṇa caitanya-nāmine, simply changing His name as Kṛṣṇa Caitanya. So His prediction will never go in vain. That's a fact.
So my plan was that 'I shall go to America. America is the leading country of the world. If I can convince the younger generation of America, they will take up.' I am old man. I came here at the age of seventy years; now I am seventy-six. So my warning is already there. In 1971, I had a severe heart attack. You know, all. So the mission of Caitanya Mahāprabhu is now in your hand. You are, American boys and girls, very intelligent and graced by Kṛṣṇa. You are not poverty-stricken. You have enough resources, prestige. Everything materially, you are all well-equipped. If you kindly take this Kṛṣṇa consciousness movement seriously, your country will be saved, and the whole world will be saved."
(Srila Prabhupada Lecture, Los Angeles, May 18, 1972)