Romans 12

What does it mean to be a living sacrifice to God? Why should we not conform ourselves to this world? How difficult is it to discern what comes from God? What is the importance of spiritual gifts? Why do some people only have so many of them? How many spiritual gifts can someone have? Do spiritual gifts still exists? What is your spiritual gift? How can you find out which one you have? How can we love each other effectively? Why should Christians not seek revenge? Why is fighting evil with evil antithetical to the gospel of Jesus Christ?