Prabhupada's lecture - Śrīmad-Bhāgavatam 1.8.44 - Māyāpura, October 24, 1974
Just like in jaundice disease that, if you... Because the doctors, the medical practitioners, they give sugar candy. The physician gives sugar candy. The sugar candy, to the person suffering from jaundice, tastes bitter: "Oh, it is bitter." But actually sugar candy is not bitter. Similarly, to the sinful man the kṛṣṇa-kathā, discussion about Kṛṣṇa, does not appear to be very palatable. They do not like to hear. They think it is waste of time. But that, as the sugar candy is the only medicine for jaundice disease, similarly, the hari-kathā, or kṛṣṇa-kathā, is the only medicine for our material disease. If we take it... Just like the jaundiced patient. If he takes sugar candy, then gradually he becomes free from the diseased condition, and at that time, the same sugar candy which he tasted in the beginning as bitter, it appears to be very, very sweet. Then he cannot live without. This is the process.
So we are in material disease at the present moment. We have forgotten Kṛṣṇa, and struggling for existence, we are trying to be happy by manufacturing so many plans. But this will not help us. Therefore Caitanya Mahāprabhu approved this process. What is that?