Kṛṣṇa is eternal, but still, He appears. The same example. Just like the sun is in the sky but we see in the morning it appears; in the evening it retires. That is defectness of our eyes. Actually the sun is always there. So similarly Vaiṣṇava, as Kṛṣṇa comes, yadā yadā hi dharmasya glānir. Similarly, a Vaiṣṇava means the confidential servant of Kṛṣṇa, he also comes for some purpose by the order of the master. So their life and Kṛṣṇa's life, it is same. There is no question of past, present, future. Nityaḥ. Nityaḥ śāśvato 'yam, na hanyate hanyamāne śarīre (BG 2.20). So they are the same thing as the appearance and disappearance of sun. And Bhaktisiddhānta Sarasvatī Ṭhākura, our master, spiritual master, he also came in this world to execute some mission of life or mission of Caitanya Mahāprabhu. So he executed it, and when it was required, he left this place and went to another place to do the same business. Just like the sun rises at six o'clock and seven o'clock there is six o'clock in another place, and it is eight o'clock another place. It is going on. Nitya-līlā.
So we have nothing to lament for disappearance. We should simply remember his activities. That is Vaiṣṇava—you cannot understand the activities of the Vaiṣṇava, but they come, any Vaiṣṇava comes, for some particular mission. Prahlāda Mahārāja,
- naivodvije para duratyayā-vaitaraṇyās
- tvad-vīrya-gāyana-mahāmṛta-magna-cittaḥ
- śoce tato vimukha-cetasa (indriyārtha-)
- māyā-sukhāya bharam udvahato vimūḍhān
- (SB 7.9.43)
Prahlāda Mahārāja said to Nṛsiṁhadeva, "My Lord, I have nothing to grieve, because wherever I shall sit down, glorifying Your activities, I immediately become merged into the ocean of nectarine. So I have nothing to grieve. But one thing I am sorry, I am in grief for these vimūḍhas." Vimūḍhān. Mūḍha means rascal, and vimūḍhai, particularly rascals. Every living being within this material world, they are mūḍhas because they are forgetting their relationship with Kṛṣṇa. Mūḍho nābhijānāti māṁ param avyayam. This is mūḍha. All living entities more or less, we are all mūḍhas, particularly vimūḍhān, because there are different types of living entities. Jalajā nava-lakṣani sthāvarā lakṣā viṁśati kṛmayo, species of life.