(Click to enlarge photo of Srila Prabhupada)
"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... 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 (Īśopaniṣad Invocation). And that love will never be, I mean to say, 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."
(Srila Prabhupada Lecture, London, August 11, 1971)