Bhagavad Gītā Chapter Four verse 17
कर्मणो ह्यपि बोद्धव्यं बोद्धव्यं च विकर्मणः ।
अकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः ॥ १७ ॥
karmaṇo hyapi boddhavyaṃ boddhavyaṃ ca vikarmaṇaḥ |
akarmaṇaśca boddhavyaṃ gahanā karmaṇo gatiḥ ||
Commentaries and Reflections
Commentary by TKV Desikachar:
“Karma is the means to know oneself.”