śri bhagavān uvācha–Śrī Kṛṣṇa said: (he) pārtha–O son of Kuntī; yadā–when; (jīvaḥ)–the living being; prajahāti–gives up; sarvān–all; kāmān–desires; manaḥ-gatān–entering the mind; tuṣṭaḥ (bhavati)–and is content; ātmanā eva–by the self; ātmani–within the self; tadā– then; (saḥ)–that person; uchyate–is said to be; sthita-prajñaḥ–of steady intelligence. [55]

The Supreme Lord said: O Pārtha, one who rejects all desires that enter the mind and remains self satisfied within is known as a person whose wisdom is firmly established.