In the Bṛhad-Vāmana Purāṇa, the Lord says, "Although I have many fascinating pastimes, whenever I think of the rāsa-līlā, which I perform with the gopīs, I become eager to have it again."
One devotee has said, "I know about Nārāyaṇa, the husband of the goddess of fortune, and I also know about many other incarnations of the Lord. Certainly all the pastimes of such incarnations are exciting to my mind, but still, the pastimes of the rāsa-līlā performed by Lord Kṛṣṇa Himself are wonderfully increasing my transcendental pleasure."
In the Tenth Canto, 31st Chapter, 15th verse, of Śrīmad-Bhāgavatam, the gopīs lament: "My dear Kṛṣṇa, during the daytime when You go out into the forest of Vṛndāvana with Your cows, we consider one moment to be twelve years, and it is very difficult for us to pass the time. And again when You come back at the end of the day, by seeing Your beautiful face we are so much attracted that we are unable to stop looking upon You constantly. At these times, when there is occasional blinking of our eyelids, we condemn the creator, Lord Brahmā, as a dunce, because he does not know how to make perfect eyes!" In other words, the gopīs were disturbed by the blinking of their eyes because for the moment that their eyes were closed they could not see Kṛṣṇa. This means that the gopīs' love for Kṛṣṇa was so great and ecstatic that they were disturbed by even His momentary absence. And when they saw Kṛṣṇa, they were also disturbed. This is a paradox.
One gopī, expressing herself to Kṛṣṇa, says: "When we meet You at night, we consider the duration of night to be very small. And why speak of only this night? Even if we had a night of Brahmā* we would consider it a very short time!" We get an idea of Brahmā's day from the following statement of the Bhagavad-gītā: "By human calculation, a thousand yuga cycles taken together is Brahmā's one day. And such also is the duration of his night." (BG 8.17) The gopīs said that even if they could have that duration of night, it would still not be sufficient for their meeting with Kṛṣṇa.