It is described in the Viṣṇu Purāṇa that when Akrūra came to take Kṛṣṇa and Balarāma to Mathurā, just by seeing Their faces he became so cheerful that all over his body there were symptoms of ecstatic love. This state is called happiness.
It is stated in the Tenth Canto, 33rd Chapter, 12th verse of Śrīmad-Bhāgavatam: "Upon seeing that Kṛṣṇa's arm was placed on her shoulder, one of the gopīs engaged in the rāsa dance became so ecstatically happy that she kissed Kṛṣṇa on His cheek." This is an instance of feeling happiness because of achieving a desired goal.
In the Tenth Canto, 71st Chapter, 29th verse of Śrīmad-Bhāgavatam, it is said: "When Kṛṣṇa first came from His Kingdom, Dvārakā, to Indraprastha,* the young females of the city became so eager to see Him that even at night, when they were lying down with their husbands, they could not restrain their eagerness. Even though they were not properly dressed and although their hair was loose and there were many household duties to perform, they still gave up everything and immediately went into the street to see Kṛṣṇa." This is an instance of eagerness of ecstatic love.
- Indraprastha is the present-day Delhi.
In his book Stavāvalī, Śrī Rūpa Gosvāmī has prayed for the mercy of Rādhārāṇī, who was so captivated by the flute vibrations of Kṛṣṇa that She immediately asked information of His whereabouts from residents in the Vṛndāvana forest. Upon first seeing Kṛṣṇa, She was filled with such ecstatic love and pleasure that She began to scratch her ears. The damsels of Braja and Rādhārāṇī were very expert in talking cunningly, so as soon as they saw Kṛṣṇa they began their talkings; and Kṛṣṇa, pretending to go for some flowers for them, immediately left that place and entered into a mountain cave. This is another instance of eager loving exchanges on the parts of both the gopīs and Kṛṣṇa.
When Kṛṣṇa was fighting with the Kāliya snake by dancing on his heads, Kāliya bit Kṛṣṇa on the leg. At that time Garuḍa became infuriated and began to murmur: "Kṛṣṇa is so powerful that simply by His thundering voice the wives of Kāliya have had miscarriages. Because my Lord has been insulted by this snake, I wish to immediately devour him, but I cannot do so in the presence of my Lord, because He may become angry with me." This is an instance of eagerness to act in ecstatic love as a result of dishonor to Kṛṣṇa.