Yogasūtra II.2 - samādhi-bhāvanā-arthaḥ kleśa-tanūkaraṇa-arthaḥ-ca
The purpose [of Kriyāyoga] is to nourish Samādhi and weaken the sources of affliction.
The twofold role of Kriyāyoga is clearly stated in this Sūtra. Patañjali reminds us that, despite being disturbed, if we have embarked on the path of Yoga, the goal is to reach the state of Samādhi. However, this becomes possible only when we reduce the Kleśa-s, the sources of our afflictions.
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