It seems that over time, due to traditions & ideology passed down, Christians not reading their bibles regularly, coupled with receiving false teaching, there is a lack of understanding towards the difference between the Law of Moses (the Law) & the Grace of God (Grace). It seems most Christians understand that they live by grace, which is true. The problem is while they understand that they live by grace, they still believe we live by the Law as well. This is an extremely important concept to understand. If not understood, you run the risk of not understanding doctrine, which can affect the way we live, how we live, and the acceptance of false doctrine.