One who is facing dangerous position for others' benefit, they are very quickly recognized by Krishna.

We left in the early morning for Vrindavana. Srila Prabhupada, Gopala Krishna and Harikesa Swami traveled together in a car, and the rest of us traveled in Yasodanandana Swami's bus. Although the road was a little washed out in places, we encountered no difficulties on the two and half hourjourney. As Prabhupada's car pulled up at the gates of Krishna-Balaram Mandir a large crowd of devotees, including a small number of Western gurukula boys, gave him a big welcome with a lively kirtana andjoyous shouts of "Jaya Prabhupada!" Since this is Prabhupada's first time back since April, everyone was in bliss to see him. Prabhupada went straight in to greet the brilliant forms of Sri Sri Gaura-Nitai, Sri Sri Krishna-Balarama and Sri Sri Radha-Syamasundara, sip caranamrita and then cross back over the marble floor to sit on his vyasasana for guru-puja. He then delivered a powerful arrival address from Bhagavad-gita 7.15. "So we have made this verse a standard of examination. We haven't got to do anything. Everything is there because Krishna is the original guru," he said, going on to explain that because everyone in the bodily concept of life is like an animal, they cannot understand that we have to change this body. Therefore Krishna personally comes because we are part and parcel of Him. "Mamaivamso jiva-bhutah. He's more anxious for us because we are suffering in this material world under bodily concept of life; that is His first instruction. Tatha dehantara-praptir. We have to understand that we have to change this body. Don't be happy because you have got by karma a comfortable body. No body is comfortable; it is temporary, even it is comfortable. Even if you have got a very nice body, American body or European body, it may appear to be very nice, better than the Indian body. But that is not permanent; you'll have to change it. That is spiritual consciousness. So we must be prepared." He told the large gathering of devotees that whatever we might do in the name of material progress is simply defeat. "So our Krishna consciousness movement is the supreme welfare activities in the world because we are trying to stop the life of hogs and dogs. Vid-bhujam, the stool-eaters, hogs. What is their business? We have seen in Vrindavana also there are many hogs. Day and nights searching after stool and eating and getting some strength and fat, then sense enjoyment?never mind whether it is mother, sister or daughter. This hogs' and dogs' life should be stopped. "So you are all fortunate that you have taken to this Krishna consciousness, bhakti-lata-bija," he said. "And proceed according to the principles. And the first principle is tad-vijnanartham sa gurum evabhigacchet. This is the first principle. Adau gurvasrayam. And in the Vedas also it is said that yasya deve para bhaktir yatha deve tatha gurau/ tasyaite kathita hy arthah prakasante. Vedic knowledge is revelation. Vedic knowledge is not understood by so-called mundane scholarship, by reading grammar. No. Vedic knowledge is possible to be understood by a person who has got unflinching faith in the bona fide guru. Guru means representative of Krishna, Krishna and His representative." Urging us all to become gurus, he pointed out the simple criteria to become one: "Yare dekha, tare kaha 'krishna'-upadesa. That's all. So this Krishna consciousness movement means to follow the instruction of Caitanya Mahaprabhu. And Caitanya Mahaprabhu's instruction is this, to preach krishna-upadesa. And this is krishna-upadesa: na mam dushkritino mudhah prapadyante naradhamah. This is not our manufactured words; it is krishna-upadesa that 'Anyone who is not surrendered to Me, dushkritina, he is immediately classified into four groups.'" Prabhupada then defined these groups: "Who is a mudha? If one does not surrender to Krishna, if one does not understand Krishna, he is either dushkritina, means sinful; mudha, rascal; naradhama, lowest of the mankind; and mayayapahrita-jnana, and his so-called education and degrees are useless because real knowledge is taken away from him. So there is no need of fighting, but we can understand what are these people in general; they are within these four groups of men. So we have to face them. Our Krishna consciousness movement is facing these rascals, these dushkritinas, these naradhamas, and to request them to become Krishna conscious." Surveying the crowd, many of whom have traveled thousands of miles to come and live in Vrindavana, he gave clear definition to their purpose for being here. "You cannot sit idly to show your gorgeousness in a secluded place, imitating Haridasa Thakura, 'Hare Krishna, Hare Krishna.' No; you have to preach. That is the order of Sri Caitanya Mahaprabhu-amara ajnaya guru hana tara ei desa. That is really following the Caitanya Mahaprabhu's [order]. Not to imitate Haridasa Thakura; even you do that very nicely, that is for your safety. Supposing that you are doing nicely, but that is for your safety. But one who is facing dangerous position for others' benefit, they are very quickly recognized by Krishna. Na ca tasman manushyeshu kascin me priya-krittamah. Ya idam paramam guhyam mad-bhakteshv abhidhasyati. Just like fighting soldiers, they are facing danger for the country, they are recognized. Similarly, those who are preachers, on behalf of Krishna preaching people to take to Krishna consciousness, they are great soldiers." Prabhupada's strong words carried the full weight of realization. He is not just an orator; he acts as well as speaks, and he infused the same sense into the hearts of his eager disciples. "So I am very happy that you Europeans and Americans especially, you are helping me. So continue this process and that is the very easy way to be recognized by Krishna. Because He says na ca tasman manushyeshu kascin me priya-krittamah. Who? Who is preaching this Krishna consciousness. So I thank you very much that you have come here in Vrindavana, and you are traveling, you are preaching. So let us dedicate this life for preaching Krishna consciousness all over the world. Never mind we die by preaching. Still, it will be glorious. Thank you very much." Strengthened at heart, their faces glowing with love for their spiritual master, the devotees cheered with appreciation as Srila Prabhupada stepped down from his seat and made his way out of the side door. Chanting his name, they followed him to the entrance to his quarters before bowing down in obeisance as he disappeared inside.