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 cause; a cause that concurs in, or is elevated to, the production of something more noble than itselfaprayojaka - not the initiatorprakṛti - the original producer of the material world; nature or process of matter; nature, character, constitution, temper, dispositionvaraṇa - surroundingbheda - divide, piercetu - moreovertatas - hence, from thatkṣetrika - like a farmer

Commentaries and Reflections

Commentary by TKV Desikachar:

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