I can be stubborn where once I learn something that really resonates with me with emphasis on my practice of karate-do I tend to resist any attempts to refute that premise even when it is incontrovertible truth. I have since found that this is a crippling trait that I now try to avoid at all costs. It assumes that my findings are the final answer when in reality all answers are subject to "change."
In this light the ken-po goku-i's reference in line seven also can mean to "see" truth; to "see" beyond our limited understanding of things; to "see" that all idea's and answers to all things are subject to the same laws that govern the Universe, i.e. constantly changing; fluid. We must "see" ourselves for what we truly are so that we don't color our view with preconceived notions and idea's that we tend to make intractable so we remain inflexible; a path to disaster and stunted growth both personal and in martial training.
Seeing all sides is to "see" all sides. Don't limit your interpretation and application of this to just what you literally see to all sides of your physical presence. Step outside the box, see all sides!