When human beings were created the obligation of selfless action was also created. God promised that through selfless action human beings would fulfill their deepest desires. Good people, who share the fruits of their work, are freed from all their sins. But those who keep the fruits of their work for themselves, consume sin. Every selfless action is inpired by God; he is present in every good deed. All life turns on this truth.
The Bhagavad Gita: 13-16