Which is better to live by the law or the Spirit of God?

The law cannot give life. God said if the law could give life He would have given a law that did. Jesus Christ is life. 1 Corinthians 15:45 says that Jesus is now a life giving Spirit. The New Covenant we are under is based on the Spirit that gives life not the law which kills. It is based on better promises than the Old Covenant which said "If you do then God will.." & "If you don't then God won't." The New Covenant says "God has finished everything. Trust Him to experience His loving life in you now and forevermore."