ŚB 2.5.17

The Battle of Kurukṣetra, or any other battle at any place or at any time, is made by the will of the Lord, for no one can arrange such mass annihilation without the sanction of the Lord. The party of Duryodhana insulted Draupadī, a great devotee of Kṛṣṇa, and she appealed to the Lord as well as to all the silent observers of this unwarranted insult. Arjuna was then advised by the Lord to fight and take credit; otherwise the party of Duryodhana would be killed anyway by the will of the Lord. So Arjuna was advised just to become the agent and take the credit for killing great generals like Bhīṣma and Karṇa.

In the Vedic writings such as the Kaṭha Upaniṣad, the Lord is described as the sarva-bhūta-antarātmā, or the Personality of Godhead who resides in everyone’s body and who directs everything for one who is a soul surrendered unto Him. Those who are not surrendered souls are put under the care of the material nature (bhrāmayan sarva-bhūtāni yantrārūḍhāni māyayā); therefore, they are allowed to do things on their own account and suffer the consequences themselves. Devotees like Brahmā and Arjuna do not do anything on their own account, but as fully surrendered souls they always await indications from the Lord; therefore they attempt to do something which appears very wonderful to ordinary vision. One of the Lord’s names is Urukrama, or one whose actions are very wonderful and are beyond the imagination of the living being, so the actions of His devotees sometimes appear very wonderful due to the direction of the Lord. Beginning from Brahmā, the topmost intelligent living entity within the universe, down to the smallest ant, every living entity’s intelligence is overseen by the Lord in His transcendental position as the witness of all actions. The subtle presence of the Lord is felt by the intelligent man who can study the psychic effects of thinking, feeling and willing.