Now that Jorge was a teenager, he thought about his childhood often. He had often fought with his little brother over silly things, and he felt very guilty about it. Once, he even started a fight over a toy on his little brother's birthday for no reason. To this day, Jorge still felt bad about it. When he told his friend about this, she explained that was all in the past. She reminded him that they have a great relationship now. Jorge listened carefully as she continued. "Sometimes we make mistakes, but the mistakes are not what is important," she said. "It is when you realize your mistakes, learn from them, and move on. Just like you did with your brother." What is the theme?