This week, Jesus continues to reveal to us one of the most important teaching of the Bible, the doctrine of sin. We do not like to talk about this, think about this, and definitely hear about this doctrine. Here in the Sermon on the Mount, Jesus makes it clear that all of us have sinned in the worst ways. Most people think that they are above sin, especially grievous sins like murder and adultery. But Jesus tells us that we have all committed murder and adultery in our hearts. At the same time, He calls us to living like citizens of the Kingdom of Heaven - forgiven and pure.