What makes an incident in am individual's life worth retelling?

I had to think about this one for a while, because I couldn't choose an answer, and in the end, I believe that an incident can be worth retelling for moral education, so as to teach others about what is right or wrong. It can also help people learn from your mistakes. Sometimes though, another's memories simply help us get a new perspective on how we are compared to the world, and make us a bit less selfish.