(Prabhupada's lecture - Śrīmad-Bhāgavatam 2.1.1-4 – Boston - December 22, 1969)
The successful life means to make our consciousness changed into Kṛṣṇa consciousness. That is success. Labdhvā su-durlabham idaṁ bahu-sambhavānte. We have got this after many, many births, mānuṣyam, this human form of life. Therefore the śāstra says, tūrṇaṁ yateta. I am very glad. You all young boys and girls, you are fortunate. I am not bluffing you. Actually you are fortunate. You have come to the right place, where you can learn Kṛṣṇa consciousness. This is the greatest boon of life. Tūrṇaṁ yateta. The śāstra says that "Very quickly you should try to finish this business." Because Parīkṣit Mahārāja, he was aware that he was going to live for seven days. But we do not know whether our life is still for seven days or seven minutes. Any moment. There is no guarantee. Don't think that "In old age we shall take up this business of Kṛṣṇa consciousness." By the example of Parīkṣit Mahārāja, we can take the lesson that we do not know when we shall die, but before death we have to become competent in Kṛṣṇa consciousness. What is that competency? Always, twenty-four hours, thinking of Kṛṣṇa. That's all. This is competence.