अष्टादशपुराणां सारं व्यासेन कीर्तितम् ।
परोपकारः पुण्याय पापाय परपीडनम् ॥
In eighteen lenthy episodes of puranas Vyasa (author of the epic Mahabharatha which has 18 episodes named puranas) has described one thing. Helping others is vitue - troubling others is sin. Show me one religious book that deals with something different.