Any person who can quickly execute a very difficult task is called expert. About the expertise of Kṛṣṇa there is a statement in the Tenth Canto, 59th Chapter, 13th verse, of the Śrīmad-Bhāgavatam, wherein Śukadeva Gosvāmī tells Mahārāj Parīkṣit: "O best of the Kurus, Śrī Kṛṣṇa cut into pieces all the different weapons used by different fighters." Formerly, fighting was done by releasing different kinds of arrows. One party would release a certain arrow, and the other party had to defeat it by counteracting it with another arrow. For example, one party might release an arrow which would cause water to pour from the sky, and to counteract this, the opposing party would have to release an arrow which could immediately turn the water into clouds. So from this statement it appears that Kṛṣṇa was very expert in counteracting the enemy's arrows. Similarly, at the rāsa dance, each and every gopī requested that Kṛṣṇa individually become her partner, and Kṛṣṇa immediately expanded Himself into so many Kṛṣṇas in order to be coupled with each and every gopī. The result was that each gopī found Kṛṣṇa by her side. 17. Grateful
Any person who is conscious of his friend's beneficent activities and never forgets his service is called grateful. In the Mahābhārata, Kṛṣṇa says, "When I was away from Draupadī, she cried with the words, 'Hey, Govinda!' This call for Me has put Me in her debt, and that indebtedness is gradually increasing in My heart." This statement by Kṛṣṇa gives evidence of how one can please the Supreme Lord simply by addressing Him: "Hey, Kṛṣṇa! Hey, Govinda!"
The mahā-mantra (Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare) is also simply an address to the Lord and His energy. So to anyone who is constantly engaged in addressing the Lord and His energy, we can imagine how much the Supreme Lord is obliged. It is impossible for the Lord to ever forget such a devotee. It is clearly stated in this verse that anyone who addresses the Lord immediately attracts the attention of the Lord, who always remains obliged to him.
Another instance of Kṛṣṇa's feeling of obligation is stated in connection with His dealings with Jāmbavān. When the Lord was present as Lord Rāmacandra, Jāmbavān, the great king of the monkeys, rendered very faithful service to Him. When the Lord again appeared as Lord Kṛṣṇa, He married Jāmbavān's daughter and paid him all the respect that is usually given to superiors. Any honest person is obliged to his friend if some service has been rendered unto Him. Since Kṛṣṇa is the supreme honest personality, how can He forget an obligation to His servitor?
Any person who observes regulative principles and fulfills his promises by practical activity is called determined. As far as the Lord's determination is concerned, there is an example in His dealings in the Harivaṁśa. This is in connection with Lord Kṛṣṇa's fighting the King of heaven, Indra, who was forcibly bereft of the pārijāta flower. Pārijāta is a kind of lotus flower grown on the heavenly planets. Once, Satyabhāmā, one of Kṛṣṇa's queens, wanted that lotus flower, and Kṛṣṇa promised to deliver it; but Indra refused to part with his pārijāta flower. Therefore there was a great fight, with Kṛṣṇa and the Pāṇḍavas on one side and all of the demigods on the other. Ultimately, Kṛṣṇa defeated all of them and took the pārijāta flower, which He presented to His queen. So, in regard to that occurrence, Kṛṣṇa told Nārada Muni, "My dear great sage of the demigods, now you can declare to the devotees in general, and to the nondevotees in particular, that in this matter of taking the pārijāta flower, all the demigods—the Gandharvas, the Nāgas, the demon Rākṣasas, the Yakṣas, the Pannagas—tried to defeat Me, but none could make Me break My promise to My queen."