Hare Krsna-below we have two separate lectures parts. The first one explains that  if we want to become happy- we must love God, for without that love, nothing we do will satisfy our craving for love or happiness. The second one Srila Prabhupada explains HOW we Love this person Krsna. Very simple explanations, both lectures.
Hare Krsna
damaghosa das
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Lecture London Aug 13 1971
…When your loving propensity will be placed in the proper place, you will be happy. This is Kṛṣṇa consciousness, love of Godhead.
sa vai puṁsāṁ paro dharmoyato bhaktir adhokṣajeahaituky apratihatāyayātmā samprasīdati [SB 1.2.6]
If you want happiness, then you must learn how to love God. You are trying to love somebody, but you are being frustrated, foiled. Because except God, nobody is loving object. And if you love God, then naturally you love everything because God is everything. The example is that if you pour water on the root of the tree, it goes everywhere—to the twigs, to the leaves, to the flowers, everywhere. But if you pour water on the leaf, it is localized. It does not spread. So we are manufacturing, inventing, so many humanitarian work, welfare work, but still, people are unhappy. Why? Because it is pouring water on the leaf, not on the root. So learn by Kṛṣṇa consciousness how to love Kṛṣṇa and how to love your country, your society, your friends, everything. But without loving Kṛṣṇa, you cannot love. This is the secret. And if you love… Just like because I love Kṛṣṇa, therefore I have come to your country. I had no business to come to your country, naturally. But we are preaching this Kṛṣṇa consciousness movement means we love everyone. We don’t make any distinction. We love animals also. We don’t like to see animal killing. That is also one of our propaganda: “No meat-eating.” Why? To save the animals, because we love animals also. We love even the ant—because we love Kṛṣṇa.
So this is the technique of Kṛṣṇa consciousness, that if you learn how to love Kṛṣṇa, then you will love everything. Otherwise, your love will be localized and you will be frustrated. It is most scientific. And our process is very simple: chant Hare Kṛṣṇa. That’s all. Kṛṣṇa and Kṛṣṇa’s name—nondifferent. So chanting Hare Kṛṣṇa means you are associating with Kṛṣṇa. That means you are directly in touch with the root of everything. So by advancing in love for Kṛṣṇa, you can love your society, your country, your community, your family, your husband, your wife, your children, your friend—everything, complete, pūrṇam. Pūrṇam adaḥ pūrṇam idaṁ pūrṇāt pūrṇam udacyate, pūrṇasya pūrṇam ādāya [Iso Invocation]. And that love will never be ended. Pūrṇa. Love of Kṛṣṇa is so complete that you go on distributing this love; it will never be expended. It will remain the same stock. So I am very glad to see you in this temple. Please try to understand our philosophy of Kṛṣṇa consciousness. We have got books, and at the same time we have got the simple method, chanting of Hare Kṛṣṇa, in which even a small child can take part. The small… Most erudite scholar also can take part, and an innocent child who has no education, no literary sense, he can also take part equally. And equally, both of them take the same advantage. A small child who comes before the Deity and dances and claps, he is getting the result. Don’t think that it is in vain. He is also getting the same… Just like fire. Either a child touches or an adult touches, fire’s action will be there, equal. Similarly, anyone who is coming in this temple, offering obeisances, taking little prasāda, joining with the chanting, hearing some talks, everyone will be benefited spiritually. That is our Kṛṣṇa consciousness movement.
Thank you very much.
Devotee: Jaya, Prabhupāda. (end)
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Lecture London July 12 1972
Indian guest: How does repeating one word, “Kṛṣṇa,” or singing “Rāma” and “Kṛṣṇa” help achieving the way?
Prabhupāda: Because you’ll be in touch with Kṛṣṇa. Kṛṣṇa and Kṛṣṇa’s name not different because Kṛṣṇa is absolute. So you see, these European and American boys and girls, simply by chanting how they are advancing in spiritual consciousness. This is practical, not theoretical. “Kṛṣṇa” means Kṛṣṇa. Just like here in this material world, if I want to drink water, if I say “water, water, water,” that will not satisfy me. I want the substance water. So here there is difference between the name and the substance. But in the absolute world there is no such difference. Nāma cintāmaṇiḥ kṛṣṇaḥ. Kṛṣṇa the person and Kṛṣṇa’s name the same thing. Therefore if you chant “Kṛṣṇa,” then you are in direct touch with Kṛṣṇa. So that will help you for your spiritual advancement. Just like if you are in touch with fire you will get yourself warmer and warmer and warmer, and at last you’ll get red fire. Similarly, if we are in touch with Kṛṣṇa, then we advance spiritually, and then we become completely spiritualized, our original Brahman. This is the process. Simple process. Chant Hare Kṛṣṇa and you’ll gradually develop your spiritual consciousness. That is actually happening. It is not story. You can see practically how they are spiritually advancing. So why not experiment yourself? What is the loss? If you chant Hare Kṛṣṇa, is there any loss? Tell me, is there any loss? But why don’t you do it? Why not make a try? Instead of arguing, you see practically what is happening. They are of different civilization, different culture. How they are developing their Kṛṣṇa consciousness? How it is possible? Simply by chanting. This is practical. Throughout the whole world—in Africa, in America, in Canada, everywhere. So this is very simple process. But people will waste their time by arguing. Why not make an experiment and see what is the result? That is our propaganda. (end)
 
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