Difference between Pin (Punya) and Kusal(Kushala)? I have seen people using the words Pin ("good deeds") interchangeably with Kusal; and Paw ("bad deeds") interchangeably with Akusal.

But there are clear differences between them -- per my understanding:


Pin (Good deeds) - Actions done physically, verbally or with mind that has good karmas
Kusal - Anything that would lead you in the path to nirvana.


(Paw (Bad deeds) and Akusal are the opposites of the above.)

But I'm not sure about these definitions. I would like to know the exact meaning of these and how they are related to each other?
Pin(Punya) and Kusal are both same. Pin means that which purifies the mind. Kusala means that which is born of wisdom or that which counters defilements. The good deeds that lead to birth in heavenly realms are called Wattagamini-Kusala and the good deeds that lead to Nibbana are called Viwattagamini-Kusala. Here's an explanation by ven. Nauyane Ariyadhamma Thera.