Bhagavad Gita 4.17
कर्मणो ह्यपि बोद्धव्यं बोद्धव्यं च विकर्मणः । अकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः ॥
karmaṇo hy api boddhavyaṃ boddhavyaṃ ca vikarmaṇaḥ | akarmaṇaś ca boddhavyaṃ gahanā karmaṇo gatiḥ ||
Translation
It is needful to discriminate action, to discriminate also forbidden action, and to discriminate inaction; impenetrable is the course of action.
Reflection
Which of the three are you most often actually in, when you believe you are in another?
Read this verse in its chapter: Chapter Four
Gahanā karmaṇo gatiḥ. Deep is the path of action. The verse names three categories to be understood. Action: the work assigned. Vikarma, forbidden action: the wrong work, even if energetic. Akarma, inaction: the absence of work, including the absence disguised as something else. Boddhavyam, to be understood, three times. The student is being given a three-axis map and told the geography is dense. The next verse will hand him the clearest single instrument for reading the map.