This quote suggests that the key to achieving success is to identify and be helpful in some capacity. Identifying a need and filling it involves understanding what is missing and providing something, such as a product or service, to remedy the situation. This is the same idea behind finding a hurt and healing it, or finding a problem and solving it. In either case, finding a solution is the key to success. By recognizing a need in the world and finding a way to fill it, heal it, or solve it, you can help people and in turn become successful.