Do not imitate the nitya-siddha; follow regulated devotional practice under proper guru guidance always.Listen — Srila Prabhupada Uvaca
Prabhupāda: [leads jaya rādhā-mādhava] [break]
Pradyumna: [leads chanting, etc.] Translation: "Prahlāda Mahārāja fixed his mind and sight upon Lord Nṛsiṁhadeva with full attention in complete trance. With a fixed mind, he began to offer prayers in love with a faltering voice." Prabhupāda: astauṣīd dharim ekāgramanasā susamāhitaḥ prema-gadgadayā vācā tan-nyasta-hṛdayekṣanaḥ [SB 7.9.7] So this is the process. This process you cannot expect immediately, but if you practice general process, very easily done, as it is recommended in the Bhagavad-gītā, man-manā bhava mad-bhakto mad-yājī māṁ namaskuru [Bg 18.65]. You cannot get the position of Prahlāda Mahārāja immediately.
That is not possible. The process is, first of all, sādhana-bhakti. [regulative devotional service] This Prahlāda Mahārāja's position is different. He is mahā-bhāgavata.
In many places we have seen already, he is nitya-siddha. There are two kinds of devotees..., three: nitya-siddha, sādhana-siddha, kṛpa-siddha. These things are described in The Nectar of Devotion. Nitya-siddha means they are eternally associate of the Supreme Personality of Godhead.
They are called nitya-siddha. And sādhana-siddha means one is fallen in this material world, but by practice of devotional service according to the rules and regulation, injunction of the śāstra, direction of guru, in this way, one can reach also the same position as the nitya-siddha. This is sādhana-siddha. And there is another.
That is kṛpa-siddha. Kṛpa-siddha means... Just like Nityānanda Prabhu, He wanted that these Jagāi-Mādhāi must be delivered. There was no sādhana.
They never followed any rules and regulation. They were thieves and rogues, very fallen condition. But Nityānanda Prabhu wanted to show an example that "I shall deliver these two brothers. Never mind they are so fallen." That is called kṛpa-siddha.