We all have lost someone in our life, it does not matter whether they are alive or not, the thing is matter that we have lost them. So if they are not with us, then is it not our responsibility that after they leave, at least we should talk about their positive things because now if we talk about the negative thing then there is no benefit because its doesn't have effect on anybody . Because the world move forward on its own,so it is important to keep going with the flow of time. If you cannot change something, then do not pay attention to it, just be cool in yourself because time always changes it never remains the same.always remember it no matter what.