Advanced devotees can control their senses; therefore a devotee can be addressed as rajan - king

Expressions researched:
"Advanced devotees can control their senses; therefore a devotee can be addressed as rājan"

Srimad-Bhagavatam

SB Canto 4

In this verse Vidura is addressed as rājan, which means "O King." In this regard, Śrīla Viśvanātha Cakravartī Ṭhākura comments that a dhīra never becomes angry because he is always situated in devotional service. Advanced devotees can control their senses; therefore a devotee can be addressed as rājan. A king controls and rules in various ways among citizens; similarly, one who can control his senses is the king of his senses. He is a svāmī or gosvāmī. The svāmīs and gosvāmīs are therefore sometimes addressed as mahārāja, or king.

SB 4.30.45, Translation and Purport

My dear King, at the time of devastation, Lord Śiva emits fire and air from his mouth out of anger. To make the surface of the earth completely treeless, the Pracetās also emitted fire and air from their mouths.

In this verse Vidura is addressed as rājan, which means "O King." In this regard, Śrīla Viśvanātha Cakravartī Ṭhākura comments that a dhīra never becomes angry because he is always situated in devotional service. Advanced devotees can control their senses; therefore a devotee can be addressed as rājan. A king controls and rules in various ways among citizens; similarly, one who can control his senses is the king of his senses. He is a svāmī or gosvāmī. The svāmīs and gosvāmīs are therefore sometimes addressed as mahārāja, or king.