Romans 7

http://www.esvbible.org/Romans+7/

Laws are only binding as long as a person is alive. Paul gives the example of a married woman. She is only bound to stay true to her husband as long as he is alive. When he dies, she can get married to someone else, and she is not technically committing adultery. In this way, Moses' laws have died to us. We are not bound to them anymore. Now we have "remarried" the heart and desires of Jesus Christ. It is what God wants for us that should control what we do.

Moses' Teachings point out what sins are. For example, Paul says that he read not to have wrong desires (those outside of God's standards for us). After reading that, he found himself sinning in this way. Before he read it, he simply followed only what God dictated to him, and so this sin wasn't necessarily part of his life. On the flip side, there are sins that we commit that we don't know we're committing or don't know are sins. By a more careful study of the word of God, we can find and change these parts of our lives.

People are inherently sinful, and God's standards may seem hard to match for this reason. There are times that even when we try to do what is right, we do wrong. We do things that we hate ourselves for doing because we know that they are against God. But it is not us who does them but sin within our worldly desires. It is still sin that we need forgiveness for, but if you suffer because of your sins and feel awful after you do something like that, be encouraged. God is at work in you. If you didn't feel anything about your sins, you would be in trouble because that means you are not in the Spirit who points out right and wrong.