The whole instruction to Arjuna is that Arjuna wanted to satisfy his senses. His senses. He wanted that, that by not fighting with the opposite party, who were composed of his relatives, brothers and brother-in-laws and father-in-laws and so many relatives, so he did not want to fight. And therefore this instruction of Bhagavad-gītā was needed by Kṛṣṇa. The whole basic principle is this.
Now, that was Kṛṣṇa's . . . Arjuna's own satisfaction of the senses. Arjuna did not want to fight. Materially, it appears very nice that he is giving up his claim of kingdom for satisfying his relatives. "Oh, he's very good man." But Kṛṣṇa did not approve it. Why? Because the basic principle was Arjuna decided to satisfy his own senses. Externally it appeared very nice. But anything which is done for the satisfaction of his own senses, that is kāma, kāma—lust, desire.
Here it is prescribed that you can do anything. There is no harm. Whatever your business or vocation, occupation, you are engaged in, that has not to be changed. That has not to be changed. Simply your consciousness has to be changed. That's all. Kāma-rāja-varjitāḥ. How? How that consciousness can be changed?
Now, jñānāgni-dagdha-karmāṇam. That consciousness, transferring the present self-interested consciousness to Kṛṣṇa consciousness, requires knowledge. Requires knowledge. And what is that knowledge? That knowledge is that, "I am part and parcel of Kṛṣṇa. I'm not different from Kṛṣṇa. I am part and parcel. I am the superior energy of Kṛṣṇa." That is knowledge.
Knowledge means to understand something. How this tape recorder is manufactured, if we get some knowledge, technical knowledge, that is not knowledge. That is a, of course, to have some our occupation executed. That knowledge is temporary knowledge. But real knowledge is . . . this is real knowledge. The real knowledge is that when one understands convincingly that "I am part and parcel of Kṛṣṇa." Kṛṣṇa, or God. When we say Kṛṣṇa, you should understand the Supreme Lord, the Absolute Truth. Kṛṣṇa is the technical word which is meant for indicating the Absolute Truth, the Supreme Personality of Godhead, the whole, the whole pleasure, the whole attraction. These are the meaning of "Kṛṣṇa."
So we are all part and parcel of the supreme pleasure, and our pleasure . . . just like my hand. This is my hand. Now, this my hand can take pleasure when it is attached with my body. My hand can take pleasure when it serves my body. It does not take pleasure by serving your body.