There are good and bad moments in our life and this situation will never change, such is life and we can do nothing about it. I am going to speak about horrible moments, accidents, tragedies and bad experiences. As for bad experiences, ok, they are really life experience and they make us experienced and wise people, but tragedies and all the other stuff… in short, I wish human's mind had an ability to completely forget such terrible things that ever happened to us in some short period of time, thereby saving us from nightmares and different fears that disturb our life. Then we could be healthier, I believe, because mental health is very important and sad thoughts and memories really do us harm.