Morality is not an action or consequence that was good or bad, it is the interaction with the act of will; the will is motivated by duty, according to Kant, it is also a problem of reason, where we decide what to do and what not to do. The cited example of the seller with morality because he keeps the same price to all buyers, experienced and even inexperienced. The seller decided to be honest, this was the main reason and he also has a moral duty acquired through his life experience with the practice of learned habits and good manners. Another reason why the seller wants to be honest and maintain the price for all customers is that ultimately he wants to be happy. But if they do it the other way around, they will be selfish people. With respect to this point of view I can say that through our life with the experience that we will acquire over the years; we can help other people take action and do things better and differently than we did before. For example, when a father gives advice to his son, sometimes the children have also received good advice, since in many cases they will do differently anyway. By making mistakes due to lack of experience in their life, they do not mature emotionally and, again, in many cases they are not yet responsible for them. Responsibility and maturity in a person