Bhagavad Gita · Chapter 3: The Path of Action
Bhagavad Gita 3.27
प्रकृतेः क्रियमाणानि गुणैः कर्माणि सर्वशः ।
अहङ्कारविमूढात्मा कर्ताहमिति मन्यते ॥
prakṛteḥ kriyamāṇāni guṇaiḥ karmāṇi sarvaśaḥ | ahaṅkāravimūḍhātmā kartāhamiti manyate ||
All actions are carried out by the qualities of nature. One whose mind is deluded by ego thinks, "I am the doer."
Modern context
Every action is carried out by the forces of nature: body, temperament, upbringing, circumstances. The ego then steps in and says 'I did it'. Consider how much of any achievement came from things you did not create: your health, your teachers, your chances. Seeing this takes the swagger out of success and the sting out of failure. Our part is real, and it is smaller than the ego claims.