कर्मण्येवाधिकारस्ते मा फलेषु कदाचन ।

मा कर्मफलहेतुर्भुर्मा ते संगोऽस्त्वकर्मणि ॥

You have a right to perform your prescribed duty, but you are not entitled to the fruits of action. Never consider yourself to be the cause of the results of your activities, and never be attached to not doing your duty. - Bhagavad Gita, Chapter II, Verse 47