Hardwork could be the biggest factor that make a person can achieve success. It is hard to know what exactly the reason behind someone success. In my opinion it's not only mere hardwork. To illustrate, let's say there are thousand peoples who want to reach a successful state in life and yet, each one of them have the same morals, attitude and discipline. Maybe only one percent of them that able to make it, it is not a statistical fact, but in reality i think the number is not that significantly different from what i have illustrated. While everyone have the same urge and motivation of wanting a success in life, why only small group of people can truly achieve it. So, respectfully, without discrediting a successful person, Luck indeed plays an important role behind someone success.