(Click to enlarge photo of Srila Prabhupada)
"Kṛṣṇa consciousness means the more you become active in Kṛṣṇa conscious, the more you become joyful. Ānandamayo 'bhyāsāt. That means your real life becomes revealed, joyful life. And as you become joyful, so you are more energetic to work for Kṛṣṇa. That will give you impetus. It is not a dead, stereotyped thing. It is dynamic force. The more you work for Kṛṣṇa, the more you feel energetic, the more you feel light. It is practical. Ask so many students. They are feeling, yes, joyful. There are so many attraction of material life. Oh, how they can forget? How they can forget? Especially in your country, there are so many facilities of material enjoyment, and how they can forget all these unless they have got some enjoyment? So it is practical. The more you engage yourself in Kṛṣṇa consciousness, the more you feel joy, joyer. That is joyful life.
In the Caitanya-cari..., Caitanya Mahāprabhu said, ānandāmbudhi-vardhanam. Ānandāmbudhi-vardhanam means there is an ocean of joy. Now this ocean is stagnant; it does not increase. But that ānandāmbudhi, the ocean of joy, transcendental bliss, that increases, increases. And there is unlimited space also to allow that increment. Ānandāmbudhi-vardhanaṁ prati-padaṁ pūrṇāmṛtāsvādanam: 'In every step you'll feel, oh, that spiritual bliss.' Paraṁ vijāyate śrī-kṛṣṇa-saṅkīrtanam: 'All glories to Śrī Kṛṣṇa Saṅkīrtana.' Just like in the morning lecture, we were... Caitanya Mahāprabhu is explaining His practical experience, how He's feeling joyful. So this is practical. There is nothing theoretical. This is standard, practical and easy."
(Srila Prabhupada Lecture, San Francisco, March 13, 1967)