That is kṣatriya's duty. So one demon was very much disturbing the ṛṣis in the jungle. So they came to Daśaratha Mahārāja to get some relief. Kṣatraṁ dvijatvaṁ ca parasparārtham. He said, "My dear King Daśaratha, I have come to you for some help. The disturbance is going on." Just like we go to the government for police help if there is some disturbance, this is the duty of the government, kṣatriya. So "We are having sacrifices, penances for the whole humanity. Now we are disturbed. You save us." Kṣatraṁ dvijatvaṁ ca parasparārtham. This is required.
Parasparārtham means mutual help. The brāhmaṇas should give advice to the kṣatriyas, to the government, and the government, according to the nice good advice, should maintain the state. In this way there will be peaceful condition of the society. Therefore there is the institution of varṇāśrama. Cātur-varṇyaṁ māyā... Kṛṣṇa says, "I have made this varṇāśrama for the benefit of the whole human society, although I don't belong to any varṇa, āśrama." Kṛṣṇa has nothing to do, but to maintain the human society very peaceful, advancing in spiritual knowledge, this varṇāśrama is required. Therefore sometimes I become very eager to start a varṇāśrama college. We have nothing to do with varṇāśrama, we Kṛṣṇa..., But we want to see that the whole human society is peaceful. That is our mission. Sarve sukhino bhavantu. This is the desire of the Supreme Personality of Godhead, and those who are servants of the Supreme Personality of Godhead, they should also desire how to do good to the whole human society. A Vaiṣṇava is not only interested for his own benefit. His own benefit is already done as soon as he has taken shelter of Kṛṣṇa's lotus feet. He has nothing else desire over. Everything is finished, protected by Kṛṣṇa. Kaunteya pratijānīhi na me bhaktaḥ praṇaś... (BG 9.31). But they work in the human society on behalf of Kṛṣṇa so that they may be happy, peaceful, and make progress in spiritual life. That is Vaiṣṇava's duty. Otherwise Vaiṣṇava has nothing to ask. Kṛṣṇa knows how to help him, how to give him all protection. So he has no anxiety.