Madhudviṣa: Thirty-nine: "A faithful man who is absorbed in transcendental knowledge and who subdues his senses, quickly attains the supreme spiritual peace (BG 4.39)."
Prabhupāda: Yes. So a faithful man who understands that "I am part and parcel of Kṛṣṇa," and he is always engaged in the service of Kṛṣṇa in Kṛṣṇa consciousness, who is absorbed in transcendental knowledge—this is samādhi, absorbed—and who subdues his senses quickly... Subdue means if you apply your senses in the service of Kṛṣṇa, then your senses are subdued automatically.
Just like if you make your promise that "I shall take only kṛṣṇa-prasādam," then your nonsense eating or satisfying the tongue by nonsense eating—immediately stopped. That is subdued. God does not say that "You starve." God does not say. Or "You do not eat nice things." But God says, "You eat really nice things; don't eat nonsense nice things." Instead of eating nonsense meat, you eat sweetballs. You see? It is not stoppage, but giving better.
So better food, better consciousness, better knowledge, better, life, better association—what you want more? Better philosophy. What do you want more? Naturally "attains the supreme spiritual peace." His everything is better; there must be... The result must be the better, the supreme peace. All right.