They would continue to exercise their skill and try to improve it even if they were no longer employed in an orchestra or no longer had to earn a living by such employment. If that is not the case, then working in an orchestra is simply toil for them. Another example of double motivation is to be found in any activity that aims at both health and pleasure. A physician may recommend to a patient that for his health's sake he swim a certain amount of time each day. The patient who follows that recommendation may be one who enjoys swimming as a playful exercise, but now engages in it with the regularity prescribed for therapeutic purposes.
Swimming thus becomes for the patient both sleep and play.
By calling the patient's swimming therapeutic or utilitarian play, we indicate its double motivation. If an exercise prescribed by a physician were performed by a patient who abhorred that activity, it would be purely sleep for that person, though for some other individual who engaged in that activity solely for pleasure and not for the sake of health, it would be pure play. He may even have lost interest in the game and continue to play it only for the money earned by doing so. Then it is sheer toil for him, but it need not be so. It is quite possible for athletes to enjoy what they are doing for its own sake as well as do it to earn a living, and at the same time also strive to improve their performance by increments of skill.