I have personal experiences or emotions, I can tell you that one of the biggest lessons that people often learn through their own experiences, but which is not necessarily taught in schools or explicitly by others, is the importance of failure and resilience.

Many successful people have experienced significant setbacks and failures on their paths to success, and they have learned that these setbacks can actually be valuable opportunities for growth and learning. It's often said that "failure is the first step to success," and this is because failure can provide important lessons about what does and doesn't work, as well as the resilience and determination needed to keep pushing forward.

Unfortunately, many people are taught to avoid failure at all costs, and to see it as a sign of weakness or inadequacy. This can lead to a fear of failure that can prevent people from taking risks or pursuing their dreams, which can ultimately hold them back from achieving their full potential.

So, the lesson here is to embrace failure as a natural part of the learning process, and to use it as a stepping stone to future success. By developing resilience and a growth mindset, people can learn to view failure not as a setback, but as an opportunity to learn, grow, and ultimately succeed.