I do not believe in "impossible"... that being said, I believe true mastery is indeed possible, though the existence of an impossibility is not in and of itself impossible... it is all hinging on relativity again, that it is only impossible when/where it is impossible... everywhen/everywhere else it is wholly possible. To elaborate (WHOA I JUST NOTICED I CAN MAKE PARAGRAPHS IN WINDOWS 8 IM TOTALLY STOKED!!!) True mastery does not necessarily mean undefeatable, but that victory and defeat become indistinguishable (to the master), and one continues to learn from every experience. True mastery is therefore not a destination, but a journey, a path. Mastery, perfection, truth... genuinely adventurous pursuits! They share the same eternal path