How to work 18 hours a day without stress?

What is the secret to working hard without stress?

If we see some people work for 18 - 20 hours a day and situated in peace and calm. However, some get stressed after an 8-hour work. Why does this happen? What is the solution?

Listen more to learn as Swami Mukundananda explains it in detail by relating one of the key mindsets that will help us enjoy hard work without stress.