I have found a strange phenomenon that we get wiser as we get older. Some things we have done during our puberty look very stupid nowadays. We really regret doing these things which wasted the most important time in our life. So, when we see children or teenagers are making the same mistakes we have made at the same age, we are concerned about their future. In fact, we don't become smart or wise as we get old. We have just learned a lot of lessons from our past life. These mistakes we have made before really hurt ourselves later. They taught us that doing anything has a consequence. It can be positive or negative which definitelly depends on the purposes. So, when we get old, we always ask ourselves why we didn't listen to our parents or the other elders' advice. Why we made the important decisions in our life without thinking about more about the future? We just spend the whole life growing up.