(Prabhupada's lecture - Śrīmad-Bhāgavatam 1.16.24 - Hawaii, January 20, 1974)
So ultimate success is... That is described in the Śrīmad-Bhāgavatam, sa vai puṁsāṁ paro dharmo yato bhaktir adhokṣaje: [SB 1.2.6] "The highest perfection is that when you understand God and you are in love with God." That is success. You are in love in God. It doesn't matter how we have learned to love God, either Christian religion or Hindu religion or Muhammadan, but if you have got that success, that you have learned how to love God, then your life is successful. Then there are different stages of loving platform, and when you love Kṛṣṇa as Rādhārāṇī did... That is not possible, but that is the aim, and that is the highest perfection. But the beginning is love, how you are in love with God. Śānta, dāsya, sākhya, vātsalya, mādhurya. So unless you come to that... If you love these material things, then you should know that you are not in love with God. If you are in love with God, then you'll forget material love. That is the test. Bhaktiḥ pareśānubhavo viraktir anyatra syāt [SB 11.2.42]. Bhakti, love of Godhead, the symptom is that he's no more in love with material things. That is the test. You cannot... Just like you cannot love two persons. That is divided. One love concentrated, that is perfect love. Similarly, another example is given that we are all hankering after love. Because we do not find whom to love, therefore we place our love even cats and dogs. We love a dog. Anyone who has no other object to love, no children, no family, no wife—all right, keep a cat, keep a dog. But love is there.
So that love is deserved for Kṛṣṇa, or the Supreme Personality of Godhead. So the more we learn how to love the Supreme Lord, that is perfection of life. Sa vai puṁsāṁ paro dharmaḥ. And what kind of love? Ahaituky apratihatā: that love is not motivated, that "I want this thing; therefore I shall love." Here in this material world the so-called love, lust, is motivated. "I'll get so much sense gratification; therefore I love a boy or a girl." That is not love; that is lust. Love means without any motive. Without any motive. Ahaitukī. And that, that love cannot be checked by any material impediments. Ahaituky apratihatā yayātmā suprasīdati. If you can reach that love of Godhead, then you'll feel, "Oh, I am so fortunate." Otherwise we remain unfortunate. So love is there everywhere. Even in cats' and dogs' love there is love. But the perfection is when you actually find the person to love and you actually do it, that is perfection.