Because it is karma, karma-yoga. The material world means you work, and you enjoy or suffer the result of your work. This is material world. Everyone is given facility, but it is karmānubandhanaḥ, karmānubandhanaḥ, just a facility for the living entities who wanted to enjoy this material world. This material world is not wanted. Everyone should live in the spiritual world. There is spiritual world. Paras tasmāt tu bhāvo 'nyo 'vyakto 'vyaktāt sanātanaḥ (BG 8.20). There is no birth and death. Yad gatvā na nivartante tad dhāma (BG 15.6). Everything is there. People do not know it.
Therefore the karma should be systematized, and it should be regulated by brahminical culture, by kṣatriya culture, by vaiśya culture, by śūdra culture. But Kṛṣṇa says that "Don't think . . . because I have prescribed this for the systematic life of all the conditioned soul, it does not mean I am also one of them." Kṛṣṇa is not one of them. And some foolish rascal, they say that "Kṛṣṇa is also bound up by the laws of karma." No. Kṛṣṇa is . . . not only Kṛṣṇa, but Kṛṣṇa's devotees also. That is stated here: iti māṁ yo 'bhijānāti karmabhir na sa badhyate (BG 4.14). Simply by knowing, simply by knowing that Kṛṣṇa is transcendental. Kṛṣṇa gives us prescription how to live in this conditional state, but He is not one of us. He is not one of us. He is above, transcendental. Therefore He says, na māṁ karmāṇi limpanti. Because Kṛṣṇa is fighting in the battlefield . . . He is not fighting, He is directing. Still, you may call that He is inducing Arjuna to fight. But that does not mean He is becoming entangled in the karma-phala. Na māṁ karmāṇi limpanti (BG 4.14). Apāpa-vidham. Kṛṣṇa is killing so many demons. He is not bound up by karma. Similarly, if we also become devotee of Kṛṣṇa, and if we abide by His order, then karma-phala cannot touch us. This is bhakti.
Karmāṇi nirdahati kintu ca bhakti-bhājām (Bs. 5.54). That is stated in the Brahma-saṁhitā. Yas tv indra-gopam athavendram aho sva-karma karmānu-phalam-abhājanti. There are millions and millions of living entities,beginning from the king of heaven, who is . . . whose name is Indra, yas tv indra-gopam athavendram aho sva-karma, beginning from that Indra, and there is one worm that is called indra-gopa, very small; you have to see with microscope. Very small, insignificant living entity. And that Indra, the king of heaven, is very important living . . . so beginning from that indra up to this Indra, everyone is bound up by the fruitive resultant action of his karma. This is called karma-phala. Yas tv indra-gopam athavendram aho sva-karma karmānu phala-bhājanam, going on under the laws of karma. Karmāṇi nirdahati kintu ca bhakti-bhājāṁ govindam ādi-puruṣaṁ tam ahaṁ bhajāmi.
The go . . . just like Arjuna was hesitating to fight because he thought that, "I shall be entangled in the karma-phala if I kill my family men and my grandfather, my teacher." So he was thinking. That was good consideration, pāpa-puṇya. But because he fought for Kṛṣṇa, because he satisfied Kṛṣṇa, he was not bound up. Yajñārthāt karmaṇo 'nyatra loko 'yaṁ karma-bandhanaḥ (BG 3.9). If you do anything for your satisfaction, then you become entangled in the karma-phala. But if you do anything for the satisfaction of Kṛṣṇa, there is no karma bondage. This is the secret. That is clearly stated. Na māṁ karmāṇi limpanti. He is the Supreme. He can direct, but He is not under the direction. He is free.
Similarly, those who are Kṛṣṇa's devotees, they are also free. Yo mām. Yo mām abhijānāti. Abhijānāti means one who knows that "Kṛṣṇa is the Supreme Personality of Godhead. He is not ordinary human being; He is nityo nityānāṁ cetanaś cetanānām (Kaṭha Upaniṣad 2.2.13), He is the supreme living entity amongst all living entities. He is the supreme living being amongst all living beings"—that is abhijānāti. Abhijānāti, know with complete experience, not superficially. Iti mām . . . yo mām abhijānāti. Abhijānāti means "Knows Me perfectly well that, 'Kṛṣṇa is transcendental.' "