Why bad things happen to good people

All of us have wondered throughout our lifetime why bad things happen to good people?  I've often been around to see really good things happen to some very bad people and it makes you shake your head in disbelief.  It makes me mad, furious even....How can these things happen?  Why is there no justice in the world?  Why do people blow up innocent people?  Why do people not question more and blindly follow? Why do children get cancer? Are these questions that cloud my brain for days and weeks on end?  No.  If it did, I'd be depressed beyond being able to function. I hope and pray that bad things teach us something and that in the end, we're not supposed to know all of the answers. I have no answers, I have only questions.