When we're talking about who we are as Christian, our character matters. People look to us to be an example of Christianity, and when we misbehave, we only substantiate a belief that all Christians are hypocritical. We need to allow Christ to build up our character and as we look at the Bible we can see that character matters:
Good Character Matters
God wants us to be the best people we can be. We need to be more like Him in our actions and words.
He asks us to walk in His footsteps and follow his example of good character. If we are truly living a life of faith, we will also strive to build good Christian character:
Romans 12:2 - Do not conform to the pattern of this world, but be transformed by the renewing of your mind. Then you will be able to test and approve what God’s will is—his good, pleasing and perfect will. (NIV)