"Singleness of purpose is one of the chief essentials for success in life, no matter what may be one's aim"

John D. Rockefeller's quote emphasizes the importance of having a clear and focused objective in order to attain success. He suggests that having a single purpose is important for success, regardless of what that function might be. This implies that having a strong sense of direction and function is more vital than the real goal itself. It is important to have a clear vision of what one wishes to achieve and to remain focused on that goal. Having a single purpose allows one to remain inspired and to stay on track. It likewise assists to remove interruptions and to remain focused on the job at hand. By having a single function, one can stay focused on the objective and work towards attaining it. This quote works as a tip that having a single function is necessary for success in life, no matter what the objective might be.