Endowed with purified intellect, subduing the mind with resolve, turning away from sound and other objects of the senses, giving up likes and dislikes.
Verily there is no purifier in this world like knowledge. One who becomes purified by Karma-yoga discovers this knowledge within (naturally) in course of time. (See also 4.31, and 5.06).
Freed from attachment, fear, and anger; fully absorbed in Me, taking refuge in Me, and purified by the fire of Self-knowledge, many have attained Me.