Board Thread:Naruto Discussions/@comment-4688597-20140903132501/@comment-24531362-20140904084657

From what I understand, Yin Release allows for the creation of intangible forces, i.e genjutsu, shadow nnjutsu, Mind Transfer, etc., while Yang Release allows for the manipulation of extant forms, hence why Naruto became a healer for a while. It also makes sense in the vein of Creation of All Things, which is Yin-Yang Release, as Yin would create the idea and Yang would give ideas form.