Krishna breaks the concept of 'work' into three distinct categories that must be deeply understood (boddhavyaṃ). 1. Karma: Prescribed, proper action in alignment with Dharma. 2. Vikarma: Forbidden, toxic, or destructive action that violates Dharma. 3. Akarma: Inaction, or action that produces no karmic reaction. He emphasizes the urgency of understanding these three because the path and trajectory of action (karmaṇo gatiḥ) is incredibly deep, thick, and impenetrable (gahanā).