how good is bad

Not sure i understand the "how good is bad" part.. but judging by the phrases you chose to use i would assume your trying to understand why bad occurences can be viewed as positive gains.. "every failure is a stepping stone to success" That's simple enough to grasp. There is always going to be a 100x more wrong ways to achieve a desired goal than there are correct ways. So for every failure, to someone capable of learning from there mistakes. experience is gained of what not to do. Everything in life is an experience, even the negative things. Learn, adapt and be prepared so next time your in a bad situation you now have the experience to get through it with ease.