One who has understood this - that only by KC is one really established in intelligence and that one should practice this art under the guidance of a bona fide spiritual master - is called sadhaka, or a suitable candidate for liberation. BG 1972 purports

Expressions researched:
"One who has understood this—that only by Kṛṣṇa consciousness is one really established in intelligence and that one should practice this art under the guidance of a bona fide spiritual master—is called"

Bhagavad-gita As it is

BG Chapters 1 - 6

As enemies are curbed by superior force, similarly, the senses can be curbed not by any human endeavor, but only by keeping them engaged in the service of the Lord. One who has understood this—that only by Kṛṣṇa consciousness is one really established in intelligence and that one should practice this art under the guidance of a bona fide spiritual master—is called sādhaka, or a suitable candidate for liberation.

BG 2.68 (1972), Translation and Purport

Therefore, O mighty-armed, one whose senses are restrained from their objects is certainly of steady intelligence.

As enemies are curbed by superior force, similarly, the senses can be curbed not by any human endeavor, but only by keeping them engaged in the service of the Lord. One who has understood this—that only by Kṛṣṇa consciousness is one really established in intelligence and that one should practice this art under the guidance of a bona fide spiritual master—is called sādhaka, or a suitable candidate for liberation.