Discipline Equals Freedom Field Manual by Jocko Willink ( PDFDrive.com )

Now, sometimes, you get plain knocked out by illness
or a virus. If it is that bad and your body
absolutely needs rest, good, listen to your body and
TAKE THE REST. Also, don’t bring your disease to the
gym to spread around. Work out at home.
Same thing with injuries. Some injuries prevent you
from doing the physical things you like to do. Good.
Do what you can, work on some skills that you can do.
Pick up a guitar. Write a book. Draw. Paint. Compose
a song. Blog. Create. Learn. Do something.
Take advantage of physical injuries and sickness by
doing something you don’t normally have time for. In
other words: GET AFTER IT.