Several years ago, I received the definition of Christianity that was a clear explanation for me, other believers and non-believers alike.
CHRISTIANITY is based upon
CHRIST’S PERFECTION, and
HIS FORGIVING NATURE and our willingness to receive both.
This definition makes it clear that there is no possible human perfection and therefore a necessity of forgiveness that is only available through a agreement with the Word of God that both are available in Christ.