It’s actually very easy to identify the difference between the old and new covenant teachings. Just ask yourself if the teaching is putting the emphasis on what you have to do or what Jesus has done. Does it make you introspective, always looking to yourself and how you fared or failed? Or does it turn your eyes away from yourself to look upon Jesus?
Joseph Prince
Unmerited Favor, Joseph Prince Teaching Resources, 2009, 148-9
GraceQuotes.com 
I ask, does it teach what I lack, but could gain if I do this or that. Or teach what I have already been given, that I may not have taken hold of. First Old, second New.
Does it teach God within me, flowing out or God outside me, available to flow in, subject to me fulfilling certain conditions or requirements. First New, second Old.
.Is heaven ‘out there’ somewhere, that I will go to when I die, or within me and breaking out on this earth, so close you can touch it?