One who is intelligent, he can understand that kāmAdināṁ katidhā na katidhā palita durnideṣaḥ (Brs. 3.2.25, quoted in CC Madhya 22.16)
"I have served throughout my whole life . . ." Serving means . . . actually I am serving not any master. I don’t like that master. I don’t wish to serve, because I know he is third-class, fourth-class man. But I am serving my lust. I think that, "By serving this man I shall get some money, so I shall be able to satisfy my senses."
So therefore I am not serving, because I am not inclined to serve him, but because I am serving his money. So kāmādināṁ katidhā na katidhā palita durnideṣaḥ (Brs. 3.2.25):
"Therefore to serve my lust, I have done so many abominable things. But in spite of doing that," teṣāṁ na karuṇā na mayi jatā, "I have served the lust," kāmādināṁ. Kāmādināṁ means not only lust—lust, anger, avarice, envy, so many things. "So I have served, throughout my whole life, but unfortunately still they are not kind to me. They are not kind to me."
One man is serving the dictation of his senses. Even if he is old, just going to die, still he is after that sense gratification. He knows that this drinking habit is not good. Nobody will say, any of his son, that "You become a drunkard like me, debauch like me," because he knows. But he cannot give it up. This is the material position. Kāmādināṁ katidhā na katidhā palita durnideṣaḥ. Always dictating.
So one who has got this sense, that "I am serving māyā. I am serving illusion. So Kṛṣṇa is demanding from me service; why not serve Kṛṣṇa?" this is intelligence. So aviduṣaḥ karuṇo vṛṇīte (SB 7.9.11). Then other thing is that I can see . . . suppose I am serving somebody in the material sense. So I am getting some money. But what I am getting if I serve Kṛṣṇa and God? I am not getting even money. It is simply I am wasting my energy. No. It says, yad yaj jano bhagavate vidadhīta mānaṁ.
The service rendered unto Kṛṣṇa, tac cātmane. If you are serving Kṛṣṇa, that means you are actually serving yourself. The same example: the hands and legs, they are serving the stomach–you see, whole day working, and the food is moving. The hand is preparing food and the brain is working, everyone. But after the preparation of food the stomach is sitting idly, and you offer it.