Yōga Sūtra 4.24

तदसङ्ख्येयवासनाभिश्चित्रमपि परार्थं संहत्यकारित्वात्।

tadasaṅkhyēyavāsanābhiścitramapi parārthaṁ saṁhatyakāritvāt।

[तत् असङ्ख्येय वासनाभिः चित्रम् अपि परार्थं संहत्य कारित्वात्।
tat = that; asaṅkhyēya = innumerable; vāsanābhiḥ = past imprints; citram = variegated; api = even though; parārthaṁ = for the sake of higher understanding; saṁhatya = by killing them; kāritvāt = operates;]

Even though that (Chitta) is afflicted by innumerable past imprints that are variegated, for the sake of higher understanding, it operates by killing them.