I always wondered about when Jesus said "You have heard that it hath been said, an eye for an eye and a tooth for a tooth....but I say unto you, if an enemy smite you on your cheek, turn to him the other (Paraphrasing)". An eye for an eye and a tooth for a tooth is in the OT. When Jesus said that "You have heard that it hath been said" does that imply that God actually never delivered that philosophy to the Israelites? I think it suggests it. That makes me wonder if some of the things Jesus said about people teaching for commandments the traditions of men are actually true of some OT verses in addition to some of the things people were doing at the same time Jesus was on earth. I never really talk about that but it's something I've thought about quite a bit.