Śrī Rūpa Goswāmī gives the essence of rāgānugā-bhakti in Bhakti-rasāmṛta-sindhu (1.2.295):

sevā sādhaka-rūpeṇa siddha-rūpeṇa cātra hi
tad-bhāva-lipsunā kāryā vraja-lokānusārataḥ

“A person desiring the mood of the Vrajavāsīs should serve Kṛṣṇa both in the sādhaka-form and in the siddha-form, following the residents of Vraja.”

Here Rūpa instructs the sādhaka to perform service in two identities:

The present, physical practitioner’s body (sādhaka-rūpa).

The eternal, perfected spiritual body (siddha-rūpa).

The second requires knowledge of that eternal form — the ekādaśa-bhāva — which is given by a qualified guru when the disciple’s heart turns toward the bhāva of the Vrajavāsīs. It is Śrī Guru alone who decides when the disciple is ready — not institutional policy, not self-appointment.

This is siddha-praṇālī: the confidential instruction to meditate daily in one’s eternal identity while continuing external sādhana. It is not a modern invention, nor a sectarian novelty — it is the direct application of Rūpa Goswāmī’s command.

Sriman Mahaprabhu taught Sanatana Goswami:

mane nija siddha‑deha kariyā bhāvana –
“Use the mind for contemplating your siddha deha.”
(CC 2.22.157)

The Lord similarly instructed Ramananda Raya:

siddha dehe cinti kore tāhāi sevana –
“Visualize your siddha deha and mentally serve in that form.”
(CC 2.8.228)

The caution of our ācāryas is not to withhold what Rūpa taught, but to give it only to those whose spark of longing (lobha) is genuine enough to treat it with reverence. Given at the right time, by the will of Śrī Guru, it becomes the bridge between the sādhaka’s present service and the eternal service awaiting in Vraja.