The teaching of the Bible

After attempting my first sermon, one of the advice I was given was: "Now that you have preached with an 'authoritative voice', you now need to learn to preach with an authoritative life"

How can we incorporate what we learn or teach from the Bible into reality? Life is even harder once you become a Christian (harder then being a non-Christian), because in addition to the struggles we experience in life we also have to be aware of what "Christian" suppose to be. The problem here is the assumption behind what is meant to be a Christian rather than referring to the Bible. Not only that, but as we turn to the Bible the amount of interpretations we have come across and heard over the years. Individuals are entitled to their own interpretations, and different interpretations will dictate different meanings, different learning and different understandings. A good example of this is the acceptance of gay and lesbian in churches. Church here, can be the methodist. Christians still debate over this issue.

What can I do, as a theological scholar, to help? How can I incorporate what I learn or teach from the Bible into real life situations?