Talent determines the upper limit, which means that you really need some talent to achieve the highest achievement in a certain industry or skill. For example, in learning, there are indeed some people who are naturally smart and learn quickly, and can easily surpass the efforts of many people, such as painting, piano and Go. Only with high talent can they become the best group of people.
Trying to determine the lower limit means that whether a person can or not will be an important factor in how far he can reach. Most people in the world are ordinary people and have no talent. Therefore, in most people at the same level, hard work is the decisive factor. As long as a person works hard, he can surpass others to a great extent. Even if he can't be the top, he can be excellent.