(Sri Vrindavan Chandra)
"If you get Kṛṣṇa, then you will not hanker after any more profit. Bās. All profit is that. Yaṁ labdhvā cāparaṁ lābham. If you get Kṛṣṇa, then all other kinds of profit you'll not hanker after. Then what kind of profit this is? Yasmin sthito guruṇāpi duḥkhena na vicālyate (BG 6.20-23). If one is situated in Kṛṣṇa consciousness, in the greatest calamity of this world, he'll not be disturbed. This is the greatest profit.
Just like Prahlāda Mahārāja. A big giant, Hiraṇyakaśipu, is putting him always in difficulty, but he's confident, 'Yes, there is Kṛṣṇa.' A five-years-old boy. He's not at all disturbed. Father is giving poison. 'All right, give me poison.' And throwing him from the hill on down. But he is steady. How it is possible? Guruṇāpi duḥkhena na vicālyate. Guru. Guru means heavy, very heavy difficulties. But na vicālyate. He's not perturbed, not disturbed. How it is possible?
So it is such a thing, that if you know Kṛṣṇa, you know everything. If you are in Kṛṣṇa consciousness, then you are not disturbed in the heaviest type of calamity. So these things should be given to the human society. One thing. That will make his life perfect."
(Srila Prabhupada Morning Walk, Los Angeles, April 28, 1973)