Kṛṣṇa's fine discretion was exhibited when He was fighting with the untouchable king who attacked the city of Mathurā. According to Vedic rites, those who are untouchable are not to be touched by the kṣatriya kings, not even for killing. Therefore, when the untouchable king seized the city of Mathurā, Kṛṣṇa did not think it wise to kill him directly with His own hand. Still the king had to be killed, and therefore Kṛṣṇa decided with fine discretion that He should flee from the battlefield so that the untouchable king would chase Him. He could then lead the king to the mountain where Mucukunda was lying asleep. Mucukunda had received a benediction from Lord Śiva to the effect that when he awoke from his sleep, whomever he might see would at once be burnt to ashes. Therefore Kṛṣṇa thought it wise to lead the untouchable king to that cave so that the king's presence would awaken Mucukunda, and he would at once be burnt to ashes.
A person is called a genius when he can refute any kind of opposing element with newer and newer arguments. In this connection there is a statement in Padyāvalī which contains the following conversation between Kṛṣṇa and Rādhā: One morning, when Kṛṣṇa came to Rādhā, Rādhā asked Him, "My dear Keśava, where is Your vāsa at present?" The Sanskrit word vāsa has three meanings: one meaning is residence, one meaning is fragrance, and another meaning is dress.
Actually Rādhārāṇī inquired from Kṛṣṇa, "Where is Your dress?" But Kṛṣṇa took the meaning as residence, and He replied to Rādhārāṇī, "My dear captivated one, at the present moment my residence is in Your beautiful eyes."
To this Rādhārāṇī replied, "My dear cunning boy, I did not ask You about Your residence. I inquired about Your dress."
Kṛṣṇa then took the meaning of vāsa as fragrance and said, "My dear fortunate one, I have just assumed this fragrance in order to be associated with Your body."
Śrīmatī Rādhārāṇī again enquired from Kṛṣṇa, "Where did You pass Your night?" The exact Sanskrit word used in this connection was yāminyāmuṣitaḥ. Yāminyām means at night, and uṣitaḥ means pass. Kṛṣṇa, however, divided the word yāminyāmuṣitaḥ into two separate words, namely yāminyā and muṣitaḥ. By dividing this word into two, it came out to mean that He was kidnapped by Yāminī, or night. Kṛṣṇa therefore replied to Rādhārāṇī, "My dear Rādhārāṇī, is it possible that night can kidnap Me?" In this way He was answering all of the questions of Rādhārāṇī so cunningly that He gladdened this dearest of the gopīs.