Now if you are going to win any battle you have to do one thing.

"Now if you are going to win any battle you have to do one
thing. You have to make the mind run the body. Never let the
body tell the mind what to do. The body will always give up.
It is always tired morning, noon, and night. But the body is
never tired if the mind is not tired. When you were younger
the mind could make you dance all night, and the body was
never tired... You've always got to make the mind take over
and keep going."

-- George S. Patton