Because it is due to want of Kṛṣṇa consciousness. When we shall be Kṛṣṇa conscious, then naturally we shall feel for every living entity because we shall know... Because in the Bhagavad-gītā it is stated, mamaivāṁśo jīva-loke jīva-bhūtaḥ sanātanaḥ: (BG 15.7) "All these living entities, they are all My fragments." They are part and parcels of Kṛṣṇa. Under circumstances, some of them have become lower animals, some of them have become big men, some of them become higher demigods, some of them become small germs. It doesn't matter. But they are all parts and parcels of Kṛṣṇa. So a person who is under Kṛṣṇa consciousness, he cannot make any injustice to any living entity. That is Kṛṣṇa consciousness.
Therefore, one who has dedicated his life for acting on account of Kṛṣṇa, under Kṛṣṇa consciousness, nirāśīr yata-cittātmā, he has no other hope except, save and except, to satisfy Kṛṣṇa. Nirāśīr yata-cittātmā tyakta-sarva-parigrahaḥ: "He doesn't like to make, exploit, the resources of the material nature." Whatever is obtained easily, as gift of nature, he accepts and he maintains his body and soul together for Kṛṣṇa's satisfaction, and he eats everything which is offered to Kṛṣṇa. Then he is freed from all kinds of sinful reactions.
Now, by the next śloka, it is more nicely explained.
- yadṛcchā-lābha-santuṣṭo
- dvandvātīto vimatsaraḥ
- samaḥ siddhāv asiddhau ca
- kṛtvāpi na nibadhyate
Now, the process of life described here, yadṛcchā-lābha-santuṣṭaḥ: "One should be satisfied with things which comes very easily." We should not try for anything too much to obtain it. No. We shall be satisfied. Whatever comes automatically or by the will of Kṛṣṇa, we may be satisfied in that way. Yadṛcchā-lābha. For gaining something, we should not be too much endeavoring. Then I shall be deviated from Kṛṣṇa consciousness.