तानि सर्वाणि संयम्य युक्त आसीत मत्परः ।
वशे हि यस्येन्द्रियाणि तस्य प्रज्ञा प्रतिष्ठिता ॥ ६१ ॥
C³ Formula : Control( सर्वाणि संयम्य ), Concentrate (युक्त आसीत मत्परः ), Conquest (वशे हि यस्येन्द्रियाणि )
One who restrains his senses, keeping them under full control, and fixes his consciousness upon Me, is known as a man of steady intelligence.
Rajarsi = Raja (king) + Rsi (sage)
King is a person who has conquered the external enemies.
Sage is a person who has conquered internal enemies especially LUST.
AND one who has conquered both external enemies and internal enemy he is a RJARSI ...
Lord Krishna chose Rajarsi like Vivasvan, Iksvaku, Manu and Arjuna to receive the knowledge of Bhagavad Gita .