UtshovBhagavad Gita 4.17
कर्मणो ह्यपि बोद्धव्यं बोद्धव्यं च विकर्मणः।
अकर्मणश्च बोद्धव्यं गहना कर्मणो गतिः।।4.17।।
Karmano hyapi boddhavyam boddhavyam cha vikarmanah
Akarmanashcha boddhavyam gahana karmano gatih
Simple meaning, written by AIOne must understand action, understand non‑action, and also understand the deep result of inaction; the true nature of action must be known.