We do not have to slavishly seek to please God by our will or works. We can, with great liberty, live our live in thankful righteousness.
The world and the devil may label you by your sin but your Heavenly Father does not. He sees you through the blood of Christ. God sees you as righteous.
Our baptism is an outward symbol that expresses what God has already done by His grace on the inside.
Luke turns our focus from the law to Christ. The law points to the righteousness of God, so it is important. However, Jesus is the fulfillment of that law for us.