प्रकृतेः क्रियमाणानि गुणैः कर्माणि सर्वशः। अहङ्कारविमूढात्मा कर्ताहमिति मन्यते॥
prakriteh kriyamanani gunaih karmani sarvashah ahankara-vimudhatma kartaham iti manyate
Translation
All actions are performed by the qualities of material nature. But one whose mind is deluded by ego thinks, 'I am the doer.'
Commentary
One of the deepest teachings in the Gita — actions are actually performed by nature's forces, not by the self. The ego creates the illusion of doership. Understanding this removes pride and guilt alike.