Few years back, attended a seminar. The presenter continuously saying about good and bad. I asked the same question which was puzzling me for quite a sometime .. How do we decide what is good and what is bad? when we are encountering the event first time in our life. Presenter not able to answer but a person from the audience answered something like, he asked me do you know what is Dharma, i said a bit :) ... He explained if the intension behind the task is good then we are doing good, if the intension behind the task is bad then it is bad.