BG - 13.21

कार्यकारणकर्तृत्वे हेतुः प्रकृतिरुच्यते।पुरुषः सुखदुःखानां भोक्तृत्वे हेतुरुच्यते।।13.21।।

kārya-kāraṇa-kartṛitve hetuḥ prakṛitir uchyate puruṣhaḥ sukha-duḥkhānāṁ bhoktṛitve hetur uchyate

• kārya - effect
• kāraṇa - cause
• kartṛitve - in the matter of creation
• hetuḥ - the medium
• prakṛitiḥ - the material energy
• uchyate - is said to be
• puruṣhaḥ - the individual soul
• sukha-duḥkhānām - of happiness and distress
• bhoktṛitve - in experiencing
• hetuḥ - is responsible
• uchyate - is said to be

Translation

In the production of the effect and the cause, Nature (matter) is said to be the cause; in the experience of pleasure and pain, the soul is said to be the one responsible.

Commentary