Yoga Sūtra Chapter Two verse 28

योगाङ्गानुष्ठानादशुद्धिक्षये ज्ञानदीप्तिराविवेकख्यातेः ॥२८॥

yoga-aṅga-anuṣṭhānāt aśuddhi-kṣaye jñāna-dīptiḥ āviveka-khyāteḥ ||28||

From performance of the limbs of Yoga the impurities diminish
and knowing illuminates up to recognition of discrimination.

yoga - the act of yokingaṅga - limbanuṣṭhāna - performanceaśuddhi - impuritykṣaya - diminish, wasting or wearing awayjñāna - knowing; knowledge; higher knowledgedīpti - illuminatesviveka - discriminationkhyāti - recognition

Commentaries and Reflections

T Krishnamacharya:

“In order to discipline the mind, we need to develop a mental practice that clearly reveals the distinction between the nature of spirit and matter.”

TKV Desikachar:

“Aṅgānuṣṭhānāt – Commitment
Irrespective of failures and testing times you will not leave it.”

“For Anuṣṭhānāt to become and remain important there needs to be Śraddhā.”