The real problem with this belief is that it causes constant fear of the bad things we have experienced. They hurt and were painful and who would want to go through that again? Yet, we spend a lot of our time worrying and preparing, just in case that situation rears its ugly head in our lives. If you sincerely believe that bad things are going to come, then they most likely will.
Patterns do happen in life, but how many of them occur because we allow them to. By spending so much time worrying about them and fearing them, we actually create them. Not one worry or fear ever added anything positive to your life, certainly not like hope and love will. Where your focus lies has a lot more to do with the events of your life more than history ever considered doing. Forget your history, focus on the potential of today.