Change
Yes. I believe people can change especially if given a second chance in life. It can be situation that can trigger it in which a person tends to come to a realization about their perspective of things. Let me tell you a story which just happened yesterday to my brother. I see this as miracle because he changed, like, drastically.
He just recently went on a trip to china. Now, as you all know china isn't the safest place now next to middle east (i do not intend to offend the middle easterns and chinese i'm merely stating a fact peace be with you) anyway, my brother isn't the best person out there. Most people hate him because of his arrogance and sky high pride. As he was on the streets of Shanghai, he was suddenly surrounded and carried by four men and well you know the usual small room with a single red light. He was asked to give all his money, credit cards and atm (they even have the swiper thing to check the cards), he was then asked to have sex with the girl and give his sperm. We think it was to set him up. But miracles happen, he doesn't know what made them not beat him up or just let him get back to his hotel without scratch but he got out of the situation. He went home right after that and he cried. In my years of existence we have never seen him cry and apologized. I think that taught him a lesson.
My next example is from a friend of mine. She had a boyfriend of 4yrs and they got married at a young age. They were very much happy during their first three years but the next years was hell to them. You see, when they were young all they see was they were inlove and they looked passed all their faults. But as they mature (this was my friends' reason) slowly they realized how different they are, their POV on things and how they see the future. Instead of growing together, they grew apart. They tried to work things out for their son, but with always having to argue even with the little things they eventually seperated. Their marriage took a toll on her for the most part she got depressed but that also changed her. That experience taught her to push her limits, she worked hard for her son and now she's the most awesome mom and person i have ever known.
As we grow older, each experience that we have makes us more mature and wiser.. Hence, even if we don't take notice about it, we do change. constantly. Not all may be good change, but that makes us human. We are entitled to make mistakes over and over again until we learn from it.