Kṛṣṇa says that ācāryaṁ māṁ vijānīyān (SB 11.17.27): "You accept ācārya as I am." Why? I see that he is a man. His sons call him father, or he looks like a man, so why he should be as good as God? Because he speaks as God speaks, that's all. Therefore. He does not make any change. Just like God says, Kṛṣṇa says, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66), the guru says that you surrender to Kṛṣṇa, or God. The same word. God says, man-manā bhava mad-bhakto mad-yājī māṁ namaskuru (BG 18.65). Guru says that you always think of Kṛṣṇa, you surrender unto Him, you offer Him prayer, you become His devotee. There is no change. Because he says as the Supreme Personality says, therefore he is guru. Even though you see that he is materially born, his behavior is like other men, but because he says the same truth as it is spoken in the Vedas or by the Personality of Godhead, therefore he is guru. Because he does not make any change whimsically, therefore he is guru. That is the definition. It is very simple.
Caitanya Mahāprabhu has asked everyone to become guru. Everyone. Because there is need of guru. The world is full of rascals; therefore there is need of so many gurus to teach them. But what is that qualification of the guru? How everyone can become guru? This may be the question, next question. Because Caitanya Mahāprabhu says, āmāra ājñāya guru hañā tāra ei deśa (CC Madhya 7.128). Ei deśa means wherever you are living you become a guru and deliver them. Suppose you are living in a small neighborhood, you can become a guru of that neighborhood and deliver them. "How it is possible? I have no education. I have no knowledge. How I can become guru and deliver them?" Caitanya Mahāprabhu said it is not at all difficult. Yāre dekha tāre kaha 'kṛṣṇa'-upadeśa (CC Madhya 7.128). This is your qualification. If you simply deliver the message given by Kṛṣṇa, you become guru. Kṛṣṇa said, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). You preach, you request everyone, "Sir, you surrender to Kṛṣṇa," you become guru. Very simple thing. Kṛṣṇa says, man-manā bhava mad-bhakto mad-yājī māṁ namaskuru (BG 18.65). You say that "You become a devotee of Kṛṣṇa, you offer obeisances. Here is a temple; here is Kṛṣṇa. Please come here. You offer your obeisances, and if you can, you offer patraṁ puṣpaṁ phalaṁ toyaṁ (BG 9.26). You don't offer . . ." But it is very simple thing. Anyone can secure a little flower, a little fruit, a little water. It is not at all difficult. So this is the guru's qualification. Guru does not show any magic or produce some wonderful things then he becomes guru.
So practically I have done this. People are giving me credit that I have done miracles, but my miracle is that I carried the message of Caitanya Mahāprabhu: yāre dekha tāre kaha 'kṛṣṇa'-upadeśa (CC Madhya 7.128). So this is the secrecy. So any one of you, you can become guru. It is not that I am an extraordinary man, an extraordinary god coming from some mysterious place. It is not that—it is very simple thing. Caitanya Mahāprabhu says that yāre dekha tāre kaha kṛṣṇa'-upadeśa. So I request you, follow the Caitanya Mahāprabhu's instruction that you also, you become a guru at your home. It is not that you have to make a gigantic show of becoming guru. The father has to become guru, the mother has to become guru. Actually, in the śāstra it is said one should not become father, one should not become mother if he does not become a guru to his children. Na mocayed yaḥ samupeta-mṛtyum. If a person is unable to save his child from the clutches of birth and death, he should not become a father. This is real contraceptive method. Not that have sex like cats and dogs, and when the child is there, kill it and abortion. No. That is greatest sinful activities. Real contraceptive method is that if you are unable to deliver your son from the clutches of birth and death, do not become a father. That is wanted. Pitā na sa syāj jananī na sa syāt guru na sa syāt na mocayed yaḥ samupeta-mṛtyum (SB 5.5.18). If you cannot save your children from the clutches of birth . . .
This is whole Vedic literature. Punar janma jayayaḥ. How to conquer over next birth, next material birth, they do not know. Foolish persons, they have forgotten Vedic culture, what is the Vedic culture. Vedic culture is to conquer over the next birth, that's all. But they do not believe in the next birth. Ninety-nine point nine percent people, they have gone so down from the Vedic culture. The Bhagavad-gītā also, the same philosophy is there: tyaktvā dehaṁ punar janma naiti mām eti kaunteya (BG 4.9). This is Vedic culture. Vedic culture means by the evolutionary process we come to this human form of life. Here is the chance of stopping transmigration of the soul from one body to another. Tathā dehāntara prāptir, and you do not know what kind of body I am going to get next. This body may be prime minister or something, and next body may be dog by the laws of nature.