Yoga Sūtra Chapter Four verse 3

निमित्तमप्रयोजकं प्रकृतीनांवरणभेदस्तु ततः क्षेत्रिकवत् ॥३॥

nimittam-aprayojakaṃ prakṛtīnāṃ varaṇa-bhedaḥ tu tataḥ kṣetrikavat ||3||

The instrumental cause is not the initiator of the process of matter,
but divides the surrounding, hence like a farmer.

nimitta - instrumental causeaprayojaka - not the initiatorprakṛti - process of mattervaraṇa - surroundingbheda - divide, piercetu - moreovertatas - hencekṣetrika - like a farmer

Commentaries and Reflections

TKV Desikachar:

“Krishnamacharya’s teaching is a Nimitta Kāraṇa
– Where you discover your own way.”