"Pay close attention to the state of your mind, and do not worry about your body;
fill any spaces where your mind is lacking but do not allow it to become
overfull at all...
Understand thoroughly how a small body can become large in spirit and know a large body can completely be small in spirit; Whether large or small, set your mind straight - having a mind that is not controlled by your body is essential."
Miyamoto Musashi - The Book Of Five Rings