(Vintage painting of Radha-Krishna, circa 1930)
"If you think of Kṛṣṇa twenty-four hours, then you'll become fully Kṛṣṇa conscious, and your life is successful. Don't allow anything. This requires little practice, abhyāsa-yoga-yuktena cetasā nānya-gāminā (BG 8.8). I should not allow my mind to go, to think of any other subject than Kṛṣṇa. Now we have got so many books. So whenever you find time... You must find time. There is so much time. So read all these books or chant. But when you are hungry, you take prasādam. When you are sleepy, take a snap. Not very much; just to refresh. And go on, either chanting the beads or reading the books or talking about Kṛṣṇa. In this way, always remain in Kṛṣṇa consciousness. Smartavyaḥ satato viṣṇuḥ. Kṛṣṇa consciousness means to remember Viṣṇu always, twenty-four hours, some way or other. Type for Kṛṣṇa, write for Kṛṣṇa, go outside for Kṛṣṇa, saṅkīrtana party, sell book for Kṛṣṇa, bring money for Kṛṣṇa, spend for Kṛṣṇa. Kṛṣṇa. That's all. Everything Kṛṣṇa. This is Kṛṣṇa consciousness."
(Srila Prabhupada Lecture, Los Angeles, May 31, 1972)