When your understanding (buddhi), bewildered by the scriptures (śruti), Shall stand immovable, Unshakable in meditation (samādhi), Then you will attain discipline (yoga).
When your understanding turns from sacred lore to stand fixed, immovable in contemplation, then you will reach discipline.
(53) When your soul, by scripture once bewildered, stands motionless and still, immovable in enstasy, then will you attain to sameness-and-indifference (yoga). The Man of Steady Wisdom Arjuna said:
2.53 When your mind that has become bewildered by hearing [S. takes the word śruti in the sense of the Vedas.-Tr.] will become unshakable and steadfast in the Self, then you will attain Yoga that arises from discrimination.
2.53 When your intellect, well enlightened by hearing from Me and firmly placed, stands unshaken in a concentrated mind, then you will attain the vision of the self.
2.53 When thy intellect, which is perplexed by the Veda text, which thou hast read, shall stand immovable and steady in the Self, then thou shalt attain Self-realization.