Ramakrishna Kshetramohan Samavedi

अष्टादशपुराणानां सारं व्यासेन कीर्तितम् | परोपकार: पुण्याय पापाय परपीडनम् || In all the 18 'Puranas' Shri. Vyaasa Maharshi has told only two gospels: Doing favour to others is 'Punya' and troubling others is 'Paapa' (Sin)!!