Kṛṣṇa does not appear or disappear. Our eyesight changes. Just like we are looking through the window. One horse race is going on. When the horse comes before the window, we can see. And when it passes through, from our eyesight, we think that horse is no longer existing. But the horse is running. This example should be taken. Kṛṣṇa is called nitya-līlā. He is taking His birth, He is fighting in the battle of Kurukṣetra, He's dancing with the gopīs. That is going on eternally in either of the so many, innumerable universes. So the same time...
Just like the change of time. Now it is nine o'clock in the watch. Now, this nine o'clock, this is now night. The morning nine o'clock is still existing somewhere. Similarly, Kṛṣṇa's līlā, Kṛṣṇa's pastime, is going on. Everything is going on at the same moment. Therefore His līlā is called nitya-līlā. Nitya means eternal. It does not change.