Not all fights are physical! Many are mental, others emotional, & most are spiritual. In any case, O Sensei Ueshiba, speaks very profound words! In order to have such a mindset we must be taught, trained & tried in the struggle or fight at hand.
If a warrior, study the art of war; if a teacher/trainer, study the art of training & educating; if a pastor, study the art of fishing & ministering! Each one has a battle all his own!