Chapter 3, Verse 16
Part of 3: Karm Yog — कर्मयोगएवं प्रवर्तितं चक्रं नानुवर्तयतीह यः। अघायुरिन्द्रियारामो मोघं पार्थ स जीवति॥
evaṁ pravartitaṁ chakraṁ nānuvartayatīha yaḥ aghāyur indriyārāmo moghaṁ pārtha sa jīvati
He who does not follow the wheel thus set in motion, who is of sinful life, rejoicing in the senses, lives in vain, O Arjuna.
This is the wheel of action set in motion by the Creator on the basis of the Veda and sacrifice. He who does not follow the wheel by studying the Vedas and performing the sacrifices prescribed therein but who indulges only in sensual pleasures lives in vain. He is wasting his life. He is leading a worthless life indeed. One who does not live in accordance with this law and who is selfish commits sin. He violates the law of the Creator and that is the worst sin.