A man is not idle because he is absorbed in thought. There is visible labor and there is invisible labor.
Just as iron rusts from disuse, even so does inaction spoil the intellect.
I never remember feeling tired by work, though idleness exhausts me completely.
Change this and that and try again. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Cras mattis consectetur purus sit amet fermentum.