We need not change the past nor worry about the future. In the now moment and in every moment we are accountable and thus avoid victimization. During our lifetime, many people will tell us what to do, where to go, what to study, where to live, etc. Some will pull us over and issue a traffic summons. Remembering every moment that we are not a victim, we will not allow anyone to dictate how we respond or feel.
Every moment is for feeling joyous.
Summary I am not a victim of the world I see. I am accountable for my actions and responses. I choose to see the world in a different way. We change our life by changing our mind. The teacher is ready for the student to learn.