it is because we live must have a Matra life
"The past is a memory, now reality and the upcoming is a challenge"
the past makes people afraid of it because every dark period of it is very sad if we remember again but let us see the future is whether we can still go back to our dark past, The past is indeed a part of one's life . Everyone has a past either bad or good. The bad past often haunts my footsteps to move forward in order to achieve a better life. The thing that I have to do is try to have a high spirits for a better future life. Do not let the bad past happen again. Precisely it can be a lash to be more vigorous and passionate in achieving a brilliant future I am sure my past can be an experience and a lesson.like @surpassinggoogle say