We cannot demand excellence from others if we do not command it from ourselves. We need to always command our best from ourselves. A good example of why we should always demand the best from ourselves is to consider the pilot on an airplane. You certainly wouldn’t want the pilot of a plane you are flying in to determine his day’s work according to his mood or his lack or sleep last night. In the same manner, you should strive to provide your best performance in all that you do.