Bageshwar Dham Sarkar

How do I know whether an action is right or wrong, punya or paap?

Punya gives joy, paap gives pain

Punya is that in which another person gets happiness, and paap (sin) is that in which another person gets pain.

Punya is that which gives another person happiness, and sin is that which causes another person pain. Understand just this; this is punya and paap.